International Symposium on Flower Bulbs Seattle, Wash, International Society for Horticultural Science. Section for Ornamental Plants, Chastagner, G. A., Doss, R. P., & Byther, R. S. (1990). Symposium on Flower Bulbs: Seattle, Washington, USA, 10-14 July 1989. International Society for Horticultural Science.
Παραπομπή σε μορφή Chicago (17η εκδ.)International Symposium on Flower Bulbs Seattle, Wash, International Society for Horticultural Science. Section for Ornamental Plants, Gary A. Chastagner, Robert P. Doss, και Ralph S. Byther. Symposium on Flower Bulbs: Seattle, Washington, USA, 10-14 July 1989. Wageningen, Netherlands: International Society for Horticultural Science, 1990.
Παραπομπή σε μορφή MLA (8th εκδ.)International Symposium on Flower Bulbs Seattle, Wash, et al. Symposium on Flower Bulbs: Seattle, Washington, USA, 10-14 July 1989. International Society for Horticultural Science, 1990.