APA (7th ed.) Citation

Foster, M., & Burton, T. (1991). The helicopter. Merlion Pub.

Chicago Style (17th ed.) Citation

Foster, Mark, and Terry Burton. The Helicopter. Wiltshire, U.K: Merlion Pub, 1991.

MLA (9th ed.) Citation

Foster, Mark, and Terry Burton. The Helicopter. Merlion Pub, 1991.