APA

Hack J. T., . (1941). Dunes of the western navajo country. New York-US: Geografical record.

Chicago

Hack John T, . 1941. Dunes of the western navajo country. New York-US: Geografical record.

Harvard

Hack J. T., . (1941). Dunes of the western navajo country. New York-US: Geografical record.

MLA

Hack John T, . Dunes of the western navajo country. New York-US: Geografical record. 1941.