APA (7th ed.) Citation

Welford, W. T. (1974). Aberrations of the symmetrical optical systems. Academic Press.

Chicago Style (17th ed.) Citation

Welford, W. T. Aberrations of the Symmetrical Optical Systems. London: Academic Press, 1974.

MLA (9th ed.) Citation

Welford, W. T. Aberrations of the Symmetrical Optical Systems. Academic Press, 1974.

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