APA

Deacon R., . (1969). A history of the British secret service. London: Frederick Muller.

Chicago

Deacon Richard, . 1969. A history of the British secret service. London: Frederick Muller.

Harvard

Deacon R., . (1969). A history of the British secret service. London: Frederick Muller.

MLA

Deacon Richard, . A history of the British secret service. London: Frederick Muller. 1969.