Gaya APA
Maxwell, J, C.
(2011).
The 21 Indispensable Qualities Of A Leader
.
Surabaya:
Menuju Insan Cemerlang.
Gaya MLA
Maxwell, John, C..
"The 21 Indispensable Qualities Of A Leader".
Surabaya:
Menuju Insan Cemerlang,
2011.
Text.