APA

Longwell (Chester R) ;Flint (Richard Foster), Dr.A.Selvakumar, . (1955). Introduction To Physical Geology. : .

Chicago

Longwell (Chester R) ;Flint (Richard Foster), Dr.A.Selvakumar, . 1955. Introduction To Physical Geology. : .

Harvard

Longwell (Chester R) ;Flint (Richard Foster), Dr.A.Selvakumar, . (1955). Introduction To Physical Geology. : .

MLA

Longwell (Chester R) ;Flint (Richard Foster), Dr.A.Selvakumar, . Introduction To Physical Geology. : . 1955.