(1989). Webster's unabridged dictionary of the English language. Portland House : Distributed by Crown Publishers.
Παραπομπή σε μορφή Chicago (17η εκδ.)Webster's Unabridged Dictionary of the English Language. New York: Portland House : Distributed by Crown Publishers, 1989.
Παραπομπή σε μορφή MLA (9th εκδ.)Webster's Unabridged Dictionary of the English Language. Portland House : Distributed by Crown Publishers, 1989.