Παραπομπή σε μορφή APA (7η εκδ.)

Cook, E. P. (2012). Understanding people in context: The ecological perspective in counseling. American Counseling Association. https://doi.org/10.1002/9781119222743

Παραπομπή σε μορφή Chicago (17η εκδ.)

Cook, Ellen Piel. Understanding People in Context: The Ecological Perspective in Counseling. Alexandria, VA: American Counseling Association, 2012. https://doi.org/10.1002/9781119222743.

Παραπομπή σε μορφή MLA (8th εκδ.)

Cook, Ellen Piel. Understanding People in Context: The Ecological Perspective in Counseling. American Counseling Association, 2012. https://doi.org/10.1002/9781119222743.