APA aipamena

Parsons, J. J., & Denevan, W. M. Pre-Columbian Ridged Fields.

Chicago Style aipamena

Parsons, James J., y William M. Denevan. Pre-Columbian Ridged Fields.

MLA aipamena

Parsons, James J., y William M. Denevan. Pre-Columbian Ridged Fields.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.