Time-Life Books. (1987). Getting firm: Shaping and toning. Time-Life Books.
Dyfyniad Arddull ChicagoTime-Life Books. Getting Firm: Shaping and Toning. Alexandria, Virginia: Time-Life Books, 1987.
Dyfyniad MLATime-Life Books. Getting Firm: Shaping and Toning. Time-Life Books, 1987.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.