APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

Allen, Bryce L. Information Tasks: Toward a User Centered Approach to Information Systems. San Diego [u.a.]: Acad. Press, 1996.

MLA (9th ed.) Citation

Allen, Bryce L. Information Tasks: Toward a User Centered Approach to Information Systems. Acad. Press, 1996.