Gaya APA
Skinner, B, J., Indonesia, Y, O.
(1976).
SUMBER DAYA BUMI
.
Yogyakarta:
Gadjah Mada University Press.
Gaya MLA
Skinner, Brian, J.., Indonesia, Yayasan, Obor.
"SUMBER DAYA BUMI".
Yogyakarta:
Gadjah Mada University Press,
1976.
Text.