Penjerdel (Corporation). (1961). Historical development of local government in the Penjerdel region. Pennsylvania Economy League (Eastern Division).
Chicago-Zitierstil (17. Ausg.)Penjerdel (Corporation). Historical Development of Local Government in the Penjerdel Region. Philadelphia?: Pennsylvania Economy League (Eastern Division), 1961.
MLA-Zitierstil (8. Ausg.)Penjerdel (Corporation). Historical Development of Local Government in the Penjerdel Region. Pennsylvania Economy League (Eastern Division), 1961.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.