Warren. Rick. (2002). The Purpose Driven Life: What on earth am i here for. Zondervan.
Citazione stile Chigago Style (17a edizione)Warren. Rick. The Purpose Driven Life: What on Earth Am I Here for. Grand Rapids: Zondervan, 2002.
Citatione MLA (9a ed.)Warren. Rick. The Purpose Driven Life: What on Earth Am I Here for. Zondervan, 2002.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.