Oregon State University. Extension Service, Washington State University. Cooperative Extension Service, Washington State University. Cooperative Extension, University of Idaho. Cooperative Extension Service, & University of Idaho. Cooperative Extension System. (1985). Pacific Northwest weed control handbook. [Extension Services of Oregon State University, Washington State University, and the University of Idaho].
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Oregon State University. Extension Service, Washington State University. Cooperative Extension Service, Washington State University. Cooperative Extension, University of Idaho. Cooperative Extension Service, và University of Idaho. Cooperative Extension System. Pacific Northwest Weed Control Handbook. Corvallis, Or.: [Extension Services of Oregon State University, Washington State University, and the University of Idaho], 1985.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)Oregon State University. Extension Service, et al. Pacific Northwest Weed Control Handbook. [Extension Services of Oregon State University, Washington State University, and the University of Idaho], 1985.