APA (7th ed.) Citation

De Vries, H. A. (1987). Fitness after 50 (3rd ed.). National Book Store.

Chicago Style (17th ed.) Citation

De Vries, Herbert A. Fitness After 50. 3rd ed. Manila: National Book Store, 1987.

MLA (9th ed.) Citation

De Vries, Herbert A. Fitness After 50. 3rd ed. National Book Store, 1987.