APA Style
Maxwell, J, C.
(2004).
the 21 Irrefutable Laws of Leadership : buku kerja
.
Batam:
Interaksara.
MLA Style
Maxwell, John, C..
"the 21 Irrefutable Laws of Leadership : buku kerja".
Batam:
Interaksara,
2004.
Magister Manajemen.