Gaya APA

Maxwell, J, C., Hanna, S. (2015). Good Leaders Ask Great Questions (1). Surabaya: Menuju Insan Cemerlang.

Gaya MLA

Maxwell, John, C., Hanna, Selvia. "Good Leaders Ask Great Questions". 1 Surabaya: Menuju Insan Cemerlang, 2015. Text.