(1977). Directory of Publishers and Producers Participating in the Materials Review and Evaluation Program.
Chicago-Zitierstil (17. Ausg.)Directory of Publishers and Producers Participating in the Materials Review and Evaluation Program. 1977.
MLA-Zitierstil (9. Ausg.)Directory of Publishers and Producers Participating in the Materials Review and Evaluation Program. 1977.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.