APA Style

Christiansen, R. (c2012). The zigzag principle : the goal-setting strategy that will revolutionize your business and your life . New York: McGraw-Hill.

MLA Style

Christiansen, Rich. "The zigzag principle : the goal-setting strategy that will revolutionize your business and your life". New York: McGraw-Hill, c2012. Koleksi Buku Teks.