Dyfyniad APA

Constantine, L. L., & Lockwood, L. A. D. (1999). Software for use: A practical guide to the models and methods of usage-centered design. Addison-Wesley.

Dyfyniad Arddull Chicago

Constantine, Larry L., and Lucy A. D. Lockwood. Software for Use: A Practical Guide to the Models and Methods of Usage-centered Design. Reading, Mass: Addison-Wesley, 1999.

Dyfyniad MLA

Constantine, Larry L., and Lucy A. D. Lockwood. Software for Use: A Practical Guide to the Models and Methods of Usage-centered Design. Addison-Wesley, 1999.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.