APA (7th ed.) Citation

Richards, Hull, & Proctor. (1995). Changes 3 class cassette set cassette A and B. Cambridge University Press.

Chicago Style (17th ed.) Citation

Richards, Hull, and Proctor. Changes 3 Class Cassette Set Cassette A and B. UK: Cambridge University Press, 1995.

MLA (8th ed.) Citation

Richards, et al. Changes 3 Class Cassette Set Cassette A and B. Cambridge University Press, 1995.