Dyfyniad APA

Smallwood. Valor, Guts, and Luck. University of Nebraska Press.

Dyfyniad Arddull Chicago

Smallwood. Valor, Guts, and Luck. University of Nebraska Press.

Dyfyniad MLA

Smallwood. Valor, Guts, and Luck. University of Nebraska Press.

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