APA (7th ed.) Citation

Parker, B. (1983). Sit down & shape up: A handbook of fitness and exercise for older adults. Leisure Press.

Chicago Style (17th ed.) Citation

Parker, Barbara. Sit Down & Shape Up: A Handbook of Fitness and Exercise for Older Adults. New York: Leisure Press, 1983.

MLA (9th ed.) Citation

Parker, Barbara. Sit Down & Shape Up: A Handbook of Fitness and Exercise for Older Adults. Leisure Press, 1983.