^Hall, Elton W. (1999). "Clifford Warren Ashley". في Garraty، John A.؛ Carnes، Mark C. (المحررون). American National Biography. Oxford University Press. ج. 1. ص. 679–680. ISBN:0-19-512780-3.
^"Clifford Ashley, Artist, Author, 65". نيويورك تايمز. 20 سبتمبر 1947. ص. 15. مؤرشف من الأصل في 2018-07-23. His age was 65. Mr. Ashley was known for his paintings of whaling subjects and three books, "The Yankee Whaler," "Whaleships of New Bedford" and "The Ashley ...
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