Gaya APA
Nana, R, D., Ashriyah, I.
(2008).
99 Ideas for happy leader
.
Jakarta:
Zip Books.
Gaya MLA
Nana, Rukmana, DW,., Ashriyah, Inayati.
"99 Ideas for happy leader".
Jakarta:
Zip Books,
2008.
Text / Book.