Gaya APA

Lantu, D, ;, E, P, ;, , A, R. (2007). Servant Leadership "The Ultimate Calling to Fulfill Your Life's Greatness" . : Gradien Books.

Gaya MLA

Lantu, Donald, ;, Erich, Pesiwarissa, ;, , Augusman, Rumahorbo. "Servant Leadership "The Ultimate Calling to Fulfill Your Life's Greatness"". : Gradien Books, 2007. Teks.