APA引文

Loken, N. C., & Willoughby, R. J. Complete book of gymnastics.

Chicago Style (17th ed.) Citation

Loken, Newton C., and Robert J. Willoughby. Complete Book of Gymnastics.

MLA引文

Loken, Newton C., and Robert J. Willoughby. Complete Book of Gymnastics.

警告：這些引文格式不一定是100％准確.