Não informado. (1968). Focus on guidance. American Personnel and Guidance Association.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Focus on Guidance. Denver, Colo: American Personnel and Guidance Association, 1968.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Focus on Guidance. American Personnel and Guidance Association, 1968.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.