Gaya APA

Keller, T. (2011). The Meaning of Marriage : Facing the Complexities of Commitment with the Wisdom of God (First). United States of America: Penguin Group US.

Gaya MLA

Keller, Timothy. "The Meaning of Marriage : Facing the Complexities of Commitment with the Wisdom of God". First United States of America: Penguin Group US, 2011. e-book.