APA (7 ম সংস্করণ) উদ্ধৃতি

Penjerdel (Corporation). (1961). Historical development of local government in the Penjerdel region. Pennsylvania Economy League (Eastern Division).

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Penjerdel (Corporation). Historical Development of Local Government in the Penjerdel Region. Philadelphia?: Pennsylvania Economy League (Eastern Division), 1961.

M.L.A (8 ম সংস্করণ) উদ্ধৃতি

Penjerdel (Corporation). Historical Development of Local Government in the Penjerdel Region. Pennsylvania Economy League (Eastern Division), 1961.