Time-Life Books. (1989). Fitness for life: Childhood to maturity. Time-Life Books.
Citazione stile Chigago Style (17a edizione)Time-Life Books. Fitness for Life: Childhood to Maturity. Alexandria, Va: Time-Life Books, 1989.
Citatione MLA (9a ed.)Time-Life Books. Fitness for Life: Childhood to Maturity. Time-Life Books, 1989.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.