Gaya APA

Ph.D., G, L, , B. (2007). What Type of Leader Are You : Using the Enneagram System to Identify and Grow Your Leadership Strengthis and Achieve Maximum Success . New York: Mc Graw Hill.

Gaya MLA

Ph.D., Ginger, Lapid, , Bogda. "What Type of Leader Are You : Using the Enneagram System to Identify and Grow Your Leadership Strengthis and Achieve Maximum Success". New York: Mc Graw Hill, 2007. Text.