Gaya APA
Hartoko, A.
(2013).
Oceanographic Characters and Plankton Resources of Indonesia
.
Yogyakarta:
Graha Ilmu.
Gaya MLA
Hartoko, Agus.
"Oceanographic Characters and Plankton Resources of Indonesia".
Yogyakarta:
Graha Ilmu,
2013.
Buku English.