Gaya APA
SAFARIA, T., [penyunt.], D, I, D.
(2007).
Optimistic quotient :
.
Yogyakarta:
Pyramid Publisher.
Gaya MLA
SAFARIA, Triantoro., [penyunt.], DINAR, IS., DH..
"Optimistic quotient :".
Yogyakarta:
Pyramid Publisher,
2007.
Buku.