Não informado. (1963). Education abstracts. American College Public Relations Association.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Education Abstracts. Washington: American College Public Relations Association, 1963.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Education Abstracts. American College Public Relations Association, 1963.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.