* {{cite book | last = Weaver | first = Williams Woys | year = 1997 | title = Heirloom Vegetable Gardening: A Master Gardener's Guide to Planting, Seed Saving and Cultural History | publisher = Henry Holt and Company | isbn = 978-0-8050-4025-8 }}
{{refend}}
== 扩展阅读 ==
==外部連結==