Dyfyniad APA

Coper, A., Reimann, R., Cronin, D., & Noessel, C. About face: The essentials of interaction design (4a ed.).

Dyfyniad Arddull Chicago

Coper, Alan, Robert Reimann, David Cronin, and Chirstopher Noessel. About Face: The Essentials of Interaction Design. 4a ed.

Dyfyniad MLA

Coper, Alan, et al. About Face: The Essentials of Interaction Design. 4a ed.

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