APA (7th ed.) Citation

Welford, W. T. (1962). Geometrical optics : optical instrumentation / by W.T. Welford: Optical instrumentation. North Holland.

Chicago Style (17th ed.) Citation

Welford, W. T. Geometrical Optics : Optical Instrumentation / by W.T. Welford: Optical Instrumentation. North Holland, 1962.

MLA (9th ed.) Citation

Welford, W. T. Geometrical Optics : Optical Instrumentation / by W.T. Welford: Optical Instrumentation. North Holland, 1962.

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