Citazione Stile APA (7a Edizione)

deVries, H. A., & Hales, D. R. (1987). Fitness after 50. Charles Scribner's Sons.

Citazione stile Chigago Style (17a edizione)

deVries, Herbert A., e Diane R. Hales. Fitness After 50. New York: Charles Scribner's Sons, 1987.

Citatione MLA (9a ed.)

deVries, Herbert A., e Diane R. Hales. Fitness After 50. Charles Scribner's Sons, 1987.