APA (7th ed.) Citation

(1977). Life does have a purpose (1. ed.). Watchtower Bible and Tract Society of New York.

Chicago Style (17th ed.) Citation

Life Does Have a Purpose. 1. ed. New York: Watchtower Bible and Tract Society of New York, 1977.

MLA (8th ed.) Citation

Life Does Have a Purpose. 1. ed. Watchtower Bible and Tract Society of New York, 1977.