Dirr's encyclopedia of trees and shrubs

MLA

Dirr, Michael. Dirr's Encyclopedia of Trees and Shrubs. Portland, Or.: Timber Press, 2011.

APA

Dirr, M. (2011). Dirr's encyclopedia of trees and shrubs. Portland, Or.: Timber Press.

Chicago

Dirr, Michael. Dirr's Encyclopedia of Trees and Shrubs. Portland, Or.: Timber Press, 2011.