Dyfyniad APA

Smith, J. P., & Simpson, K. (2014). Field guide to grasses of California. University of California Press.

Dyfyniad Arddull Chicago

Smith, James P., and Kathy Simpson. Field Guide to Grasses of California. Oakland, California: University of California Press, 2014.

Dyfyniad MLA

Smith, James P., and Kathy Simpson. Field Guide to Grasses of California. University of California Press, 2014.

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