APA (7th ed.) Citation

Bell, W. G., & Wethersett, E. R. (1966). Unknown London (A completely new ed. rev.). Spring Books.

Chicago Style (17th ed.) Citation

Bell, Walter George, and E. R. Wethersett. Unknown London. A completely new ed. rev. London: Spring Books, 1966.

MLA (8th ed.) Citation

Bell, Walter George, and E. R. Wethersett. Unknown London. A completely new ed. rev. Spring Books, 1966.