Activity-centered design : an ecological approach to designing smart tools and usable systems.

MLA

Gay, Geri, and Helene Hembrooke. Activity-centered Design : an Ecological Approach to Designing Smart Tools and Usable Systems. Cambridge: MIT, 2004.

APA

Gay, G., & Hembrooke, H. (2004). Activity-centered design : an ecological approach to designing smart tools and usable systems. Cambridge: MIT.

Chicago

Gay, Geri, and Helene Hembrooke. Activity-Centered Design: An Ecological Approach to Designing Smart Tools and Usable Systems. Cambridge: MIT, 2004.