APA (7th ed.) Citation

Welford, W. T. (1974). Aberrations of the symmetrical optical system / (by) W.T. Welford. Academic Press.

Chicago Style (17th ed.) Citation

Welford, W. T. Aberrations of the Symmetrical Optical System / (by) W.T. Welford. London: Academic Press, 1974.

MLA (9th ed.) Citation

Welford, W. T. Aberrations of the Symmetrical Optical System / (by) W.T. Welford. Academic Press, 1974.

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