Gaya APA
banjari, A, R, A.
(2012).
Be Happy at Work
(
Cet.1)
.
Yogyakarta:
FlashBooks.
Gaya MLA
banjari, Ahman, Ramadan, Al.
"Be Happy at Work".
Cet.1
Yogyakarta:
FlashBooks,
2012.
Non Fiksi.