Cooper, P. K. (1968). The third century origins of the "new" Roman army.
Chicago Style (17th ed.) CitationCooper, P. K. The Third Century Origins of the "New" Roman Army. 1968.
MLA (9th ed.) CitationCooper, P. K. The Third Century Origins of the "New" Roman Army. 1968.
Warning: These citations may not always be 100% accurate.