Oxford Thesaurus : an A-Z dictionary of synonyms.

MLA

Urdang, Laurence. Oxford Thesaurus : an A-z Dictionary of Synonyms. Oxford: Clarendon, 1991.

APA

Urdang, L. (1991). Oxford Thesaurus : an A-Z dictionary of synonyms. Oxford: Clarendon.

Chicago

Urdang, Laurence, Oxford Thesaurus: An A-Z Dictionary of Synonyms. Oxford: Clarendon, 1991.