APA

Downing D. C., Williams D. K., Downing D. C. & Williams D. K. (2006). The McGraw-Hill dictionary of misspelled and easily confused words: choose the right word and spell it correctly!. New York: McGraw-Hill.

Chicago

Downing David C, Williams Deborah K, Downing David C and Williams Deborah K. 2006. The McGraw-Hill dictionary of misspelled and easily confused words: choose the right word and spell it correctly!. New York: McGraw-Hill.

Harvard

Downing D. C., Williams D. K., Downing D. C. and Williams D. K. (2006). The McGraw-Hill dictionary of misspelled and easily confused words: choose the right word and spell it correctly!. New York: McGraw-Hill.

MLA

Downing David C, Williams Deborah K, Downing David C and Williams Deborah K. The McGraw-Hill dictionary of misspelled and easily confused words: choose the right word and spell it correctly!. New York: McGraw-Hill. 2006.