Não informado. (1963). Studies in Family Planning. Population Council.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Studies in Family Planning. New York: Population Council, 1963.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Studies in Family Planning. Population Council, 1963.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.