Cita APA (7th ed.)

Walker, K. (2007). The softball drill book. Human Kinetics.

Cita Chicago (17th ed.)

Walker, Kirk. The Softball Drill Book. Champaign, Ill: Human Kinetics, 2007.

Cita MLA (9th ed.)

Walker, Kirk. The Softball Drill Book. Human Kinetics, 2007.