APA Style

Downing, D., Williams, D, K. (2006). The McGraw-Hill Dictionary of Misspelled and Easily Confused Words . America: McGraw-Hill Companies, Inc..

MLA Style

Downing, David., Williams, Deborah, K.. "The McGraw-Hill Dictionary of Misspelled and Easily Confused Words". America: McGraw-Hill Companies, Inc., 2006. Text.