Gaya APA

TENGGONO, E., PERDANA, M, R. (2012). Be a great leader!: 42 insipring articles to be a wise leader . Jakarta: Elex Media Komputindo.

Gaya MLA

TENGGONO, Erwin., PERDANA, Maria, Renata. "Be a great leader!: 42 insipring articles to be a wise leader". Jakarta: Elex Media Komputindo, 2012. Text.