Gaya APA

Covey, S, R, , D. (1994). First things first: To live, to love, to learn, to leave a legacy. . New York dsl: New York dsl Simon & Schuster.

Gaya MLA

Covey, Stephen, R., , Dll.. "First things first: To live, to love, to learn, to leave a legacy. ". New York dsl: New York dsl Simon & Schuster, 1994. Buku.