APA (7th ed.) Citation

Wills, M., & Wills, C. A. (1981). Manbirds: Hang gliders & hang gliding. Prentice-Hall.

Chicago Style (17th ed.) Citation

Wills, Maralys, and Chris A. Wills. Manbirds: Hang Gliders & Hang Gliding. Englewood Cliffs, N.J.: Prentice-Hall, 1981.

MLA (9th ed.) Citation

Wills, Maralys, and Chris A. Wills. Manbirds: Hang Gliders & Hang Gliding. Prentice-Hall, 1981.