O'Keefe, P. R., & Aldrich, A. (1955). Education through physical activities: Physical education and recreation for elementary grades (2d ed.). Mosby.
Chicago-referens (17:e uppl.)O'Keefe, Pattric Ruth, och Anita Aldrich. Education Through Physical Activities: Physical Education and Recreation for Elementary Grades. 2d ed. St. Louis: Mosby, 1955.
MLA-referens (9:e uppl.)O'Keefe, Pattric Ruth, och Anita Aldrich. Education Through Physical Activities: Physical Education and Recreation for Elementary Grades. 2d ed. Mosby, 1955.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.