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.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিInternational Planned Parenthood Federation. Conference (7th : 1963 : Singapore) এবং 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.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিInternational Planned Parenthood Federation. Conference (7th : 1963 : Singapore) এবং 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.