Cita APA (7a ed.)

Frankau, G. (1934). Secret services. Hutchinson & co. ltd.

Cita Chicago Style (17a ed.)

Frankau, Gilbert. Secret Services. London: Hutchinson & co. ltd, 1934.

Cita MLA (9a ed.)

Frankau, Gilbert. Secret Services. Hutchinson & co. ltd, 1934.