APA (7th ed.) Citation

Columbu, F., & Knudson, R. R. (1979). Weight training for young athletes. Contemporary Books.

Chicago Style (17th ed.) Citation

Columbu, Franco, and R. R. Knudson. Weight Training for Young Athletes. Chicago: Contemporary Books, 1979.

MLA (9th ed.) Citation

Columbu, Franco, and R. R. Knudson. Weight Training for Young Athletes. Contemporary Books, 1979.