Gaya APA

Garlow, J, L. (2004). The 21 Irrefutable Laws of Leadership Tested by Time (Cet. 1). Batam: Interaksara.

Gaya MLA

Garlow, James, L.. "The 21 Irrefutable Laws of Leadership Tested by Time". Cet. 1 Batam: Interaksara, 2004. Text.