Gaya APA
Siswanto, J., Prajarto, N.
(2005).
Orientasi kosmologi
.
Yogyakarta:
Gadjah Mada University Press.
Gaya MLA
Siswanto, Joko., Prajarto, Nunung.
"Orientasi kosmologi".
Yogyakarta:
Gadjah Mada University Press,
2005.
Text.