APA (7th ed.) Citation

Orford, H., & Lockett, A. (1944). Lens-work for amateurs (5th ed.). I. Pitman.

Chicago Style (17th ed.) Citation

Orford, Henry, and Arthur Lockett. Lens-work for Amateurs. 5th ed. London: I. Pitman, 1944.

MLA (9th ed.) Citation

Orford, Henry, and Arthur Lockett. Lens-work for Amateurs. 5th ed. I. Pitman, 1944.