Não informado. (2011). Professional Psychology, Research and Practice. American Psychological Association.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Professional Psychology, Research and Practice. Arlington, Va: American Psychological Association, 2011.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Professional Psychology, Research and Practice. American Psychological Association, 2011.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.