APA (7th ed.) Citation

Unger, H. G. (1977). Planar optical waveguides and fibres. Clarendon Press.

Chicago Style (17th ed.) Citation

Unger, H. G. Planar Optical Waveguides and Fibres. Oxford [Eng.] ; New York: Clarendon Press, 1977.

MLA (8th ed.) Citation

Unger, H. G. Planar Optical Waveguides and Fibres. Clarendon Press, 1977.