Gaya APA
Megawangi, R. et al (2010).
9 Pilar of Character : Respectful, Courteous and Good Listener .
Depok:
INDONESIA HERITAGE FOUNDATION.
Gaya MLA
Megawangi, Ratna. et al.
"9 Pilar of Character : Respectful, Courteous and Good Listener".
Depok:
INDONESIA HERITAGE FOUNDATION,
2010.
Textbook.