pref. Randolph Quirk, D. S. (1991). Longman dictionary of contemporary English (New ed.). Longman.
Chicago Style (17th ed.) Citationpref. Randolph Quirk, Della Summers. Longman Dictionary of Contemporary English. New ed. Longman, 1991.
MLA (8th ed.) Citationpref. Randolph Quirk, Della Summers. Longman Dictionary of Contemporary English. New ed. Longman, 1991.
Warning: These citations may not always be 100% accurate.