Gaya APA
Rangkuti, F. (2010).
Spiritual Leadership in Business Wake Up! : Khoirunnas Anfauhum Linnas .
Jakarta:
Gramedia Pustaka Utama.
Gaya MLA
Rangkuti, Freddy.
"Spiritual Leadership in Business Wake Up! : Khoirunnas Anfauhum Linnas".
Jakarta:
Gramedia Pustaka Utama,
2010.
Text.