APA (7e ed.) Bronvermelding
Allred, S., & McDonald, L. (2015). Ponderosa: Big pine of the Southwest. The University of Arizona Press.
Chicago (17e ed.) Bronvermelding
Allred, Sylvester, en Leigh McDonald. Ponderosa: Big Pine of the Southwest. Tucson, Arizona: The University of Arizona Press, 2015.
MLA (9e ed.) Bronvermelding
Allred, Sylvester, en Leigh McDonald. Ponderosa: Big Pine of the Southwest. The University of Arizona Press, 2015.
Let op: Deze citaties zijn niet altijd 100% accuraat.