Cita APA (7a ed.)

Chipperfield, R. O. (192). Ethel opens the door: An exploit of the Shadowers. Hurst and Blackett.

Cita Chicago Style (17a ed.)

Chipperfield, Robert Orr. Ethel Opens the Door: An Exploit of the Shadowers. London: Hurst and Blackett, 192.

Cita MLA (9a ed.)

Chipperfield, Robert Orr. Ethel Opens the Door: An Exploit of the Shadowers. Hurst and Blackett, 192.