Cita APA (7a ed.)

Beyer, H., & Holtzblatt, K. (1998). Contextual design: Defining customer-centered systems. Morgan Kaufmann.

Cita Chicago Style (17a ed.)

Beyer, Hugh, y Karen Holtzblatt. Contextual Design: Defining Customer-centered Systems. San Francisco, Calif.: Morgan Kaufmann, 1998.

Cita MLA (9a ed.)

Beyer, Hugh, y Karen Holtzblatt. Contextual Design: Defining Customer-centered Systems. Morgan Kaufmann, 1998.