ebrary, Inc. (2008). The Britannica guide to the 100 most influential scientists: The most important scientists from ancient Greece to the present day. Encyclopaedia Britannica Inc..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)ebrary, Inc. The Britannica Guide to the 100 Most Influential Scientists: The Most Important Scientists from Ancient Greece to the Present Day. [London]: Encyclopaedia Britannica Inc., 2008.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)ebrary, Inc. The Britannica Guide to the 100 Most Influential Scientists: The Most Important Scientists from Ancient Greece to the Present Day. Encyclopaedia Britannica Inc., 2008.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.