Παραπομπή APA

Osteen,Joel. (2007). become a better you- 7 keys to improving your life every day. Simon & Schuster.

Παραπομπή Chicago Style

Osteen,Joel. Become a Better You- 7 Keys to Improving Your Life Every Day. UK: Simon & Schuster, 2007.

Παραπομπή MLA

Osteen,Joel. Become a Better You- 7 Keys to Improving Your Life Every Day. Simon & Schuster, 2007.