Styl cytowania APA

Covey, S. R. (1994). First things first: To live, to love, to learn to leave a legacy.

Styl cytowania Chicago

Covey, Stephen R. First Things First: To Live, to Love, to Learn to Leave a Legacy. Pocket Books, London, 1994.

Styl cytowania MLA

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