APA aipamena

Elton, H., & Elton, H. (1992). Aspects of defence in Roman Europe.

Chicago Style aipamena

Elton, H., and Hugh Elton. Aspects of Defence in Roman Europe. 1992.

MLA aipamena

Elton, H., and Hugh Elton. Aspects of Defence in Roman Europe. 1992.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.