Cita APA (7th ed.)

Allen, B. L. (1996). Information tasks: Toward a user-centered approach to information systems. Academic Press.

Cita Chicago (17th ed.)

Allen, Bryce L. Information Tasks: Toward a User-centered Approach to Information Systems. San Diego, Calif: Academic Press, 1996.

Cita MLA (9th ed.)

Allen, Bryce L. Information Tasks: Toward a User-centered Approach to Information Systems. Academic Press, 1996.