APA (7th ed.) Citation

John Paul II, P., & Messori, V. (1994). Crossing the threshold of hope (1st American ed.). Knopf.

Chicago Style (17th ed.) Citation

John Paul II, Pope, and Vittorio Messori. Crossing the Threshold of Hope. 1st American ed. New York: Knopf, 1994.

MLA (9th ed.) Citation

John Paul II, Pope, and Vittorio Messori. Crossing the Threshold of Hope. 1st American ed. Knopf, 1994.