Washington State Horticultural Association, Washington State Horticultural Association, Washington State Horticultural Association, & Washington State Horticultural Association. Proceedings, annual meeting - Washington State Horticultural Association. Washington State Horticultural Association.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)Washington State Horticultural Association, Washington State Horticultural Association, Washington State Horticultural Association, và Washington State Horticultural Association. Proceedings, Annual Meeting - Washington State Horticultural Association. Wenatchee, Wash.: Washington State Horticultural Association.
Trích dẫn kiểu MLA (xuất bản lần thứ 8)Washington State Horticultural Association, et al. Proceedings, Annual Meeting - Washington State Horticultural Association. Washington State Horticultural Association.