APA

Waterfield G., . (1968). Sultans of Aden. London: John Murray.

Chicago

Waterfield Gordon, . 1968. Sultans of Aden. London: John Murray.

Harvard

Waterfield G., . (1968). Sultans of Aden. London: John Murray.

MLA

Waterfield Gordon, . Sultans of Aden. London: John Murray. 1968.