APA (7th ed.) Citation

Greenfield, E., March, I., & Layton, R. (1988). The new Penguin guide to compact discs and cassettes. Penguin Books.

Chicago Style (17th ed.) Citation

Greenfield, Edward, Ivan March, and Robert Layton. The New Penguin Guide to Compact Discs and Cassettes. London, England ; New York, N.Y., USA: Penguin Books, 1988.

MLA (8th ed.) Citation

Greenfield, Edward, et al. The New Penguin Guide to Compact Discs and Cassettes. Penguin Books, 1988.