APA (7th ed.) Citation

Butler, M., & Gratch, B. (1982). Planning a User Study--The Process Defined.

Chicago Style (17th ed.) Citation

Butler, Meredith, and Bonnie Gratch. Planning a User Study--The Process Defined. 1982.

MLA (9th ed.) Citation

Butler, Meredith, and Bonnie Gratch. Planning a User Study--The Process Defined. 1982.

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