Gaya APA

Maxwell, J, C. (2011). The 5 levels of leadership: proven steps to maximize your potential/ John C. Maxwell (Cet.1). New Yok: Center Street.

Gaya MLA

Maxwell, John, C.. "The 5 levels of leadership: proven steps to maximize your potential/ John C. Maxwell". Cet.1 New Yok: Center Street, 2011. Text.