APA (7e ed.) Bronvermelding

Petroff, T., & Clary, J. T. (1990). Softball hitting: Fast and slow pitch. Athletic Institute.

Chicago (17e ed.) Bronvermelding

Petroff, Tom, en Jack T. Clary. Softball Hitting: Fast and Slow Pitch. North Palm Beach, Fla.: Athletic Institute, 1990.

MLA (9e ed.) Bronvermelding

Petroff, Tom, en Jack T. Clary. Softball Hitting: Fast and Slow Pitch. Athletic Institute, 1990.