Gaya APA
Wiraprdja, N, R, D.
(2008).
99 ideas for happy leader
(
1)
.
Bandung:
ZIP BOOKS.
Gaya MLA
Wiraprdja, Nana, Rukmana, D..
"99 ideas for happy leader".
1
Bandung:
ZIP BOOKS,
2008.
Text.