APA
burchfiel c., . (1982). physical geology. london: charles e. merrill publishing co. & a . bell & howell co.
Chicago
burchfiel clark, . 1982. physical geology. london: charles e. merrill publishing co. & a . bell & howell co.
Harvard
burchfiel c., . (1982). physical geology. london: charles e. merrill publishing co. & a . bell & howell co.
MLA
burchfiel clark, . physical geology. london: charles e. merrill publishing co. & a . bell & howell co. 1982.
