Gaya APA
Mallory, B, F., Kauffman, L, D, L, S, J, M, E. (1979).
Physical Geology .
Auckland:
Mc. Graw- Hill, Inc.
Gaya MLA
Mallory, Bob, F., Kauffman, L, Don, Leet, Sheldon, Judson, Marvin, E.
"Physical Geology".
Auckland:
Mc. Graw- Hill, Inc,
1979.
.