APA

State University. Extension Service, O., Peachey, R., Landgren, C., Miller, T., State University. Extension, W., of Idaho. Extension, U., States. Dept. of Agriculture, U., & Northwest Cooperative Extension, P. (2011). Weed and vegetation management in Christmas trees. : [Corvallis, Or.] : Oregon State University Extension Service ; [Pullman, Wash.] : Washington State University Extension ; [Moscow, Idaho] : University of Idaho Extension ; [Washington, D.C.] : U.S. Dept. of Agriculture.