ผลต่างระหว่างรุ่นของ "จตุราธิปไตย"

|last | last = Rees

|first | first = Roger

|title | title = = Diocletian and the Tetrarchy

| publisher = Edinburgh University Press

|date | date = 2004

|pages | pages =

|isbn | isbn = 0-7486-1661-6

|url | url = http://www.eup.ed.ac.uk/edition_details.aspx?id=1161 }}