Dyfyniad APA

Ryan, A. J. (1980). The physicain and sports medicine guide to running. McGraw-Hill.

Dyfyniad Arddull Chicago

Ryan, Allan J. The Physicain and Sports Medicine Guide to Running. New York: McGraw-Hill, 1980.

Dyfyniad MLA

Ryan, Allan J. The Physicain and Sports Medicine Guide to Running. McGraw-Hill, 1980.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.