APA Style
Billings, M, P.
(1961).
Structural Geology Second Edition
(
Ed.2, Cet.1)
.
New Jersey:
Prentice-Hall,Inc.
MLA Style
Billings, Marland, P..
"Structural Geology Second Edition".
Ed.2, Cet.1
New Jersey:
Prentice-Hall,Inc,
1961.
Text.