APA

Trueman A. E., . (1938). An introduction to geology. London: T.Murby.

Chicago

Trueman A E, . 1938. An introduction to geology. London: T.Murby.

Harvard

Trueman A. E., . (1938). An introduction to geology. London: T.Murby.

MLA

Trueman A E, . An introduction to geology. London: T.Murby. 1938.