American Sport Education Program & National Federation of State High School Associations. Officials Education Program. (2007). Officiating volleyball. Human Kinetics.
Cita Chicago (17th ed.)American Sport Education Program i National Federation of State High School Associations. Officials Education Program. Officiating Volleyball. Champaign, Ill: Human Kinetics, 2007.
Cita MLA (9th ed.)American Sport Education Program i National Federation of State High School Associations. Officials Education Program. Officiating Volleyball. Human Kinetics, 2007.
Atenció: Aquestes cites poden no estar 100% correctes.