Gaya APA

Covey, S, R. et al (1994). First Things First: to Live, to Love, to Learn, to Leave a Legacy (Cet. 1. --). New York: Simon & Schuster.

Gaya MLA

Covey, Stephen, R.. et al. "First Things First: to Live, to Love, to Learn, to Leave a Legacy". Cet. 1. -- New York: Simon & Schuster, 1994. Text.