APA aipamena

Birks, H., & Willis, K. (2008). Alpines, trees, and refugia in Europe.

Chicago Style aipamena

Birks, H., and K. Willis. Alpines, Trees, and Refugia in Europe. 2008.

MLA aipamena

Birks, H., and K. Willis. Alpines, Trees, and Refugia in Europe. 2008.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.