Não informado. (1901). Physical training. Young Men's Christian Association.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Physical Training. New York: Young Men's Christian Association, 1901.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Physical Training. Young Men's Christian Association, 1901.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.