Ashworth, S., & Whealy, K. (2002). Seed to seed: Seed saving and growing techniques for vegetable gardeners (2nd ed.). Seed Savers Exchange.
Цитирование в стиле Чикаго (17-е изд.)Ashworth, Suzanne, и Kent Whealy. Seed to Seed: Seed Saving and Growing Techniques for Vegetable Gardeners. 2nd ed. Decorah, Iowa: Seed Savers Exchange, 2002.
Цитирование MLA (8-е изд.)Ashworth, Suzanne, и Kent Whealy. Seed to Seed: Seed Saving and Growing Techniques for Vegetable Gardeners. 2nd ed. Seed Savers Exchange, 2002.
Предупреждение: эти цитированмия не могут быть всегда правильны на 100%.