International Planned Parenthood Federation. Conference (7th : 1963 : Singapore) & Cadbury, G. W. (1964). Proceedings : Seventh Conference of the International Planned Parenthood Federation, February 10-16, 1963, Singapore: Theme, Changing patterns in fertility. Excerpta Medica Foundation.
Παραπομπή σε μορφή Chicago (17η εκδ.)International Planned Parenthood Federation. Conference (7th : 1963 : Singapore) και George W. Cadbury. Proceedings : Seventh Conference of the International Planned Parenthood Federation, February 10-16, 1963, Singapore: Theme, Changing Patterns in Fertility. Amsterdam: Excerpta Medica Foundation, 1964.
Παραπομπή σε μορφή MLA (9th εκδ.)International Planned Parenthood Federation. Conference (7th : 1963 : Singapore) και George W. Cadbury. Proceedings : Seventh Conference of the International Planned Parenthood Federation, February 10-16, 1963, Singapore: Theme, Changing Patterns in Fertility. Excerpta Medica Foundation, 1964.