APA

Wellard J., . (1964). The Great Sahara. London: Hutchinson.

Chicago

Wellard James, . 1964. The Great Sahara. London: Hutchinson.

Harvard

Wellard J., . (1964). The Great Sahara. London: Hutchinson.

MLA

Wellard James, . The Great Sahara. London: Hutchinson. 1964.