Παραπομπή σε μορφή APA (7η εκδ.)

Copenhagen University Polis Centre & Hansen, M. H. (2000). A comparative study of thirty city-states cultures: An investigation. Commission Agent C.A. Reitzels Forlag.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Copenhagen University Polis Centre και Mogens Harman Hansen. A Comparative Study of Thirty City-states Cultures: An Investigation. Copenhagen: Commission Agent C.A. Reitzels Forlag, 2000.

Παραπομπή σε μορφή MLA (9th εκδ.)

Copenhagen University Polis Centre και Mogens Harman Hansen. A Comparative Study of Thirty City-states Cultures: An Investigation. Commission Agent C.A. Reitzels Forlag, 2000.