American Sport Education Program & National Federation of State High School Associations. Officials Education Program. (2007). Officiating volleyball. Human Kinetics.
Παραπομπή σε μορφή Chicago (17η εκδ.)American Sport Education Program και National Federation of State High School Associations. Officials Education Program. Officiating Volleyball. Champaign, Ill: Human Kinetics, 2007.
Παραπομπή σε μορφή MLA (9th εκδ.)American Sport Education Program και National Federation of State High School Associations. Officials Education Program. Officiating Volleyball. Human Kinetics, 2007.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.