APA (7th ed.) Citation

Oppenheimer, M. (2003). Knocking on heaven's door: American religion in the age of counterculture. Yale University Press.

Chicago Style (17th ed.) Citation

Oppenheimer, Mark. Knocking on Heaven's Door: American Religion in the Age of Counterculture. New Haven, Conn.: Yale University Press, 2003.

MLA (9th ed.) Citation

Oppenheimer, Mark. Knocking on Heaven's Door: American Religion in the Age of Counterculture. Yale University Press, 2003.