APA (7th ed.) Citation

GAUNT, L. (1977). The focalguide to lenses. Focal Press.

Chicago Style (17th ed.) Citation

GAUNT, Leonard. The Focalguide to Lenses. Focal Press, 1977.

MLA (8th ed.) Citation

GAUNT, Leonard. The Focalguide to Lenses. Focal Press, 1977.

Warning: These citations may not always be 100% accurate.