Quando se desenvolve um trabalho académico e se usa um esquema, figura ou imagem retirada de outra fonte, deve-se referenciar a fonte original.
A referência deve surgir na legenda.
Não esquecer que o uso de imagens reproduzidas em trabalhos deve ter a permissão de direitos autorais. Não basta citar a fonte.
Para mais informação sobre a referenciação de acordo com as normas APA ver AQUI:
General Format 1 (Figure from a Book):
Caption under Figure
Figure X. Descriptive phrase that serves as title and description. Reprinted [or adapted] from Book Title (page number), by Author First Initial. Second Initial. Surname, Year, Place of Publication: Publisher. Copyright [Year] by the Name of Copyright Holder. Reprinted [or adapted] with permission.
Example 1 (Figure from a Book):
Caption under Figure
Figure 1. Short-term memory test involving pictures. Reprinted from Short-term Memory Loss (p. 73), by K. M. Pike, 2008, New York, NY: Mackerlin Press. Copyright 2008 by the Association for Memory Research. Reprinted with permission.
General Format 2 (Figure from a Journal Article):
Caption under Figure
Figure X. Descriptive phrase that serves as title and description. Reprinted [or adapted] from “Title of Article,” by Author First Initial. Second Initial. Surname, Year, Journal Title Volume(issue), page number. Copyright [Year] by the Name of Copyright Holder. Reprinted [or adapted] with permission.
Example 2 (Figure from a Journal Article)
Caption under Figure
Figure 1. Schematic drawings of a bird’s eye view of the table (a) and the test phase of the choice task (b). Numbers represent the dimensions in centimeters. Adapted from “Visual Experience Enhances Infants’ Use of Task-Relevant Information in an Action Task,” by S.-h. Wang and L. Kohne, 2007, Developmental Psychology, 43, p. 1515.
General Format 3 (Figure from a Website):
Caption under Figure
Figure X. Descriptive phrase that serves as title and description. Reprinted [or adapted] from Title of Website, by Author First Initial. Second Initial. Surname, Year, Retrieved from URL. Copyright [year] by the Name of Copyright Holder. Reprinted [or adapted] with permission.
Example 3 (Figure from a Website):
Caption under Figure
Figure 1. An example of the cobra yoga position. Reprinted from List of Yoga Postures In Wikipedia, n.d., Retrieved October 28, 2009, from http://en.wikipedia.org/wiki/List_of_yoga_postures. Copyright 2007 by Joseph Renger. Reprinted with permission.