Zwirn, J. (1990). Access to U.S. government information: Guide to executive and legislative authors and authority. Greenwood Pr.
Chicago-Zitierstil (17. Ausg.)Zwirn, Jerrold. Access to U.S. Government Information: Guide to Executive and Legislative Authors and Authority. New York u.a: Greenwood Pr, 1990.
MLA-Zitierstil (9. Ausg.)Zwirn, Jerrold. Access to U.S. Government Information: Guide to Executive and Legislative Authors and Authority. Greenwood Pr, 1990.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.