APA aipamena

O'Brien, P., & Habakkuk, H. (1967). Government revenue, 1793-1815.

Chicago Style aipamena

O'Brien, P., and H. Habakkuk. Government Revenue, 1793-1815. 1967.

MLA aipamena

O'Brien, P., and H. Habakkuk. Government Revenue, 1793-1815. 1967.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.