Citazione APA

Covey, S. R. . .., Merrill,A Roger, & Merrill,Rebecca R. (1994). First things first: To live, to love, to learn, to leave a legacy. Simon.

Stile di citazione Chicago

Covey, Stephen R ., Merrill,A Roger, e Merrill,Rebecca R. First Things First: To Live, to Love, to Learn, to Leave a Legacy. New York: Simon, 1994.

Citazione MLA

Covey, Stephen R ., et al. First Things First: To Live, to Love, to Learn, to Leave a Legacy. Simon, 1994.