Leland, J., & Petkoff, R. (2018). Happiness is a choice you make: Lessons from a year among the oldest old (Unabridged.). Macmillan Audio.
Style de citation Chicago (17e éd.)Leland, John, et Robert Petkoff. Happiness Is a Choice You Make: Lessons from a Year Among the Oldest Old. Unabridged. New York, NY: Macmillan Audio, 2018.
Style de citation MLA (8e éd.)Leland, John, et Robert Petkoff. Happiness Is a Choice You Make: Lessons from a Year Among the Oldest Old. Unabridged. Macmillan Audio, 2018.
Attention : ces citations peuvent ne pas être correctes à 100%.