Gaya APA
Maxwell, J, C. (2004).
The 21 Irrefutable Laws Of Leadership ( 21 Hukum Kepemimpinan Sejati .
Batam:
Lyndon Saputra.
Gaya MLA
Maxwell, John, C..
"The 21 Irrefutable Laws Of Leadership ( 21 Hukum Kepemimpinan Sejati".
Batam:
Lyndon Saputra,
2004.
Buku Teks.