APA (7th ed.) Citation

Welch, A., & Hill, R. (1981). Soaring hang gliders / Ann Welch and Roy Hill. Murray.

Chicago Style (17th ed.) Citation

Welch, Ann, and Roy Hill. Soaring Hang Gliders / Ann Welch and Roy Hill. London: Murray, 1981.

MLA (9th ed.) Citation

Welch, Ann, and Roy Hill. Soaring Hang Gliders / Ann Welch and Roy Hill. Murray, 1981.

Warning: These citations may not always be 100% accurate.