Παραπομπή σε μορφή APA (7η εκδ.)

Hepp, J. H. (2003). The middle-class city: Transforming space and time in Philadelphia, 1876-1926. University of Pennsylvania Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Hepp, John Henry. The Middle-class City: Transforming Space and Time in Philadelphia, 1876-1926. Philadelphia: University of Pennsylvania Press, 2003.

Παραπομπή σε μορφή MLA (9th εκδ.)

Hepp, John Henry. The Middle-class City: Transforming Space and Time in Philadelphia, 1876-1926. University of Pennsylvania Press, 2003.