APA (7th ed.) Citation

Prudden, B. (1986). Bonnie Prudden's after fifty fitness guide. Villard Books.

Chicago Style (17th ed.) Citation

Prudden, Bonnie. Bonnie Prudden's After Fifty Fitness Guide. New York: Villard Books, 1986.

MLA (9th ed.) Citation

Prudden, Bonnie. Bonnie Prudden's After Fifty Fitness Guide. Villard Books, 1986.