APA (7th ed.) Citation

Loken, N. C., & Willoughby, R. J. (1977). The complete book of gymnastics (3.ed.). Prentice-Hall.

Chicago Style (17th ed.) Citation

Loken, Newton C., and Robert J. Willoughby. The Complete Book of Gymnastics. 3.ed. Englewood Cliffs, NJ: Prentice-Hall, 1977.

MLA (9th ed.) Citation

Loken, Newton C., and Robert J. Willoughby. The Complete Book of Gymnastics. 3.ed. Prentice-Hall, 1977.