Konten dihapus Konten ditambahkan
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* [http://www.foodsdatabase.com/LinkedLabel.aspx?FoodId=24465 Nutrition facts]
* {{cite book
|editor1-last = Bradley
|editor1-first = Fern Marshall
|editor2-last = Ellis
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|editor3-last = Martin
|editor3-first = Deborah L.
|year = 2009
|title = The Organic Gardener's Handbook of Natural Pest and Disease Control
|publisher = Rodale
|isbn = 978-1-60529-677-7
}}
* {{cite book
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|first1 = M. R.
|last2 = Anthony
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|last4 = Power
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|last5 = Lowe,
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|year = 2007
|chapter = Lettuce
|title = Transgenic Crops
|volume = {{nobold|Volume 59}}
|series = Biotechnology in Agriculture and Forestry
|publisher = Springer
|isbn = 978-3-540-36752-9
}}
* {{cite book
|last1 = Katz
|first1 = Solomon H.
|last2 = Weaver
|first2 = Williams Woys
|year = 2003
|title = Encyclopedia of Food and Culture
|volume = {{nobold|Volume 2}}
|publisher = Scribner
|isbn = 978-0-684-80565-8
}}
* {{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
}}
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