Gaya APA

Maxwell, J, C. (2017). The 21 irrefutable laws of Leadership (Cet. 1). Surabaya: PT Menuju Insan Cemerlang.

Gaya MLA

Maxwell, John, C. "The 21 irrefutable laws of Leadership". Cet. 1 Surabaya: PT Menuju Insan Cemerlang, 2017. Text.