Gaya APA
Gertz, J, C, D.
(BPK Gunung Mulia).
Purwa Pustaka
(
Cet.1)
.
Jakarta:
2017.
Gaya MLA
Gertz, Jan, Christian, Dkk.
"Purwa Pustaka".
Cet.1
Jakarta:
2017,
BPK Gunung Mulia.
.