APA aipamena

Dray,W.H, & Dusen, W. V. D. (1999). Principles of history. OUP.

Chicago Style aipamena

Dray,W.H, and W.J. Van Der Dusen. Principles of History. Delhi: OUP, 1999.

MLA aipamena

Dray,W.H, and W.J. Van Der Dusen. Principles of History. OUP, 1999.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.