APA (7th ed.) Citation

Walker, K. (1945). The Physiology of sex and its social implications. Penguin Books.

Chicago Style (17th ed.) Citation

Walker, Kenneth. The Physiology of Sex and Its Social Implications. England: Penguin Books, 1945.

MLA (9th ed.) Citation

Walker, Kenneth. The Physiology of Sex and Its Social Implications. Penguin Books, 1945.

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