MLA

Williams, C.S, and O.A Becklund. Optics; a Short Course for Engineers and Scientists. London: John Wiley and sons inc., 1972.

APA

Williams, C., & Becklund, O. (1972). Optics; a short course for engineers and scientists. London: John Wiley and sons inc.

Chicago

Williams, C.S., and O.A Becklund. Optics; a Short Course for Engineers and Scientists. London: John Wiley and sons inc., 1972.