Cita APA (7th ed.)

National Strength & Conditioning Association (U.S.) & Jeffreys, I. (2013). Developing speed. Human Kinetics.

Cita Chicago (17th ed.)

National Strength & Conditioning Association (U.S.) i Ian Jeffreys. Developing Speed. Champaign, IL: Human Kinetics, 2013.

Cita MLA (9th ed.)

National Strength & Conditioning Association (U.S.) i Ian Jeffreys. Developing Speed. Human Kinetics, 2013.