APA (7th ed.) Citation

Campbell, L. J., Carlton, R. J., David, & Paul. (1981). Projects in physics. Routledge & Kegan.

Chicago Style (17th ed.) Citation

Campbell, L. J., R. J. Carlton, David, and Paul. Projects in Physics. London: Routledge & Kegan, 1981.

MLA (9th ed.) Citation

Campbell, L. J., et al. Projects in Physics. Routledge & Kegan, 1981.