Dyfyniad APA
Allred, S., & McDonald, L. (2015). Ponderosa: Big pine of the Southwest. The University of Arizona Press.
Dyfyniad Arddull Chicago
Allred, Sylvester, and Leigh McDonald. Ponderosa: Big Pine of the Southwest. Tucson, Arizona: The University of Arizona Press, 2015.
Dyfyniad MLA
Allred, Sylvester, and Leigh McDonald. Ponderosa: Big Pine of the Southwest. The University of Arizona Press, 2015.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.