Dyfyniad APA

Erickson, L., & Bowen, B. (2011). Twelve owls. University of Minnesota Press.

Dyfyniad Arddull Chicago

Erickson, Laura, and Betsy Bowen. Twelve Owls. Minneapolis: University of Minnesota Press, 2011.

Dyfyniad MLA

Erickson, Laura, and Betsy Bowen. Twelve Owls. University of Minnesota Press, 2011.

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