APA (7th ed.) Citation

Guttmacher, A. F. (1971). Understanding sex: A young person's guide. George Allen & Unwin.

Chicago Style (17th ed.) Citation

Guttmacher, Alan Frank. Understanding Sex: A Young Person's Guide. London: George Allen & Unwin, 1971.

MLA (8th ed.) Citation

Guttmacher, Alan Frank. Understanding Sex: A Young Person's Guide. George Allen & Unwin, 1971.

Warning: These citations may not always be 100% accurate.