APA (7th ed.) Citation

Ryan, F. (1977). Gymnastics for girls. Penguin Books.

Chicago Style (17th ed.) Citation

Ryan, Frank. Gymnastics for Girls. Middlesex, England: Penguin Books, 1977.

MLA (9th ed.) Citation

Ryan, Frank. Gymnastics for Girls. Penguin Books, 1977.

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