APA (7th ed.) Citation

Rockwood, R. (1925). The city beyond the clouds: Or, Captured by the red dwarfs. Cupples & Leon.

Chicago Style (17th ed.) Citation

Rockwood, Roy. The City Beyond the Clouds: Or, Captured by the Red Dwarfs. New York: Cupples & Leon, 1925.

MLA (9th ed.) Citation

Rockwood, Roy. The City Beyond the Clouds: Or, Captured by the Red Dwarfs. Cupples & Leon, 1925.