Cita APA (7th ed.)
Allred, S., & McDonald, L. (2015). Ponderosa: Big pine of the Southwest. The University of Arizona Press.
Cita Chicago (17th ed.)
Allred, Sylvester, i Leigh McDonald. Ponderosa: Big Pine of the Southwest. Tucson, Arizona: The University of Arizona Press, 2015.
Cita MLA (9th ed.)
Allred, Sylvester, i Leigh McDonald. Ponderosa: Big Pine of the Southwest. The University of Arizona Press, 2015.
Atenció: Aquestes cites poden no estar 100% correctes.