APA-referens (7:e uppl.)

(1960). Northumberland county district: Scheme map - city of Newcastle. V.C.N. Blight.

Chicago-referens (17:e uppl.)

Northumberland County District: Scheme Map - City of Newcastle. N.S.W., Australia: V.C.N. Blight, 1960.

MLA-referens (9:e uppl.)

Northumberland County District: Scheme Map - City of Newcastle. V.C.N. Blight, 1960.