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.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रWashington State Horticultural Association, Washington State Horticultural Association, Washington State Horticultural Association, और Washington State Horticultural Association. Proceedings, Annual Meeting - Washington State Horticultural Association. Wenatchee, Wash.: Washington State Horticultural Association.
एमएलए (8वां संस्करण) प्रशस्ति पत्रWashington State Horticultural Association, et al. Proceedings, Annual Meeting - Washington State Horticultural Association. Washington State Horticultural Association.