Gaya APA
BUSCH, R, M. (2006).
LABORATORY MANUAL IN PHYSICAL GEOLOGY (SEVENTH EDITION).
United State of America:
Pearson Prentice Hall.
Gaya MLA
BUSCH, RICHARD, M..
"LABORATORY MANUAL IN PHYSICAL GEOLOGY".
SEVENTH EDITION
United State of America:
Pearson Prentice Hall,
2006.
Textbook.