APA (7th ed.) Citation

(1999). A practical guide to usability testing / Joseph S. Dumas, Janice C. Redish.

Chicago Style (17th ed.) Citation

A Practical Guide to Usability Testing / Joseph S. Dumas, Janice C. Redish. 1999.

MLA (9th ed.) Citation

A Practical Guide to Usability Testing / Joseph S. Dumas, Janice C. Redish. 1999.

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