APA (7th ed.) Citation

DOWNING & RISSO. (1990). 303 dumb spelling and mistakes...and what you can do about them. National Textbook Company.

Chicago Style (17th ed.) Citation

DOWNING and RISSO. 303 Dumb Spelling and Mistakes...and What You Can Do About Them. Illinois: National Textbook Company, 1990.

MLA (8th ed.) Citation

DOWNING and RISSO. 303 Dumb Spelling and Mistakes...and What You Can Do About Them. National Textbook Company, 1990.

Warning: These citations may not always be 100% accurate.