APA (7th ed.) Citation

Ian & Sylvia, Tyson, S., & Welding, P. (1990). Four strong winds. Vanguard.

Chicago Style (17th ed.) Citation

Ian & Sylvia, Sylvia Tyson, and Pete Welding. Four Strong Winds. Santa Monica, CA: Vanguard, 1990.

MLA (9th ed.) Citation

Ian & Sylvia, et al. Four Strong Winds. Vanguard, 1990.