Não informado. (1993). Journal of Aging and Physical Activity. Human Kinetics Publishers.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Journal of Aging and Physical Activity. Champaign, Ill: Human Kinetics Publishers, 1993.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Journal of Aging and Physical Activity. Human Kinetics Publishers, 1993.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.