Não informado. (1961). American Family Physician. American Academy of General Practice.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. American Family Physician. Kansas City, Kan: American Academy of General Practice, 1961.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. American Family Physician. American Academy of General Practice, 1961.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.