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William Shurtleff, Akiko Aoyagi: History of Soybeans and Soyfoods in Australia, New Zealand and Oceania (1770-2010). Extensively Annotated Bibliography and Sourcebook. Soyinfo Center, Lafayette (CA) 2010, ISBN 978-1-928914-29-7, S.166–167 (englisch, eingeschränkte Vorschau in der Google-Buchsuche).
William Shurtleff, Akiko Aoyagi: History of Erewhon. Natural Foods Pioneer in the United States (1966–2011). Soyinfo Center, Lafayette (CA) 2011, ISBN 978-1-928914-33-4, S.22 (englisch, soyinfocenter.com [PDF]).