APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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

Warning: These citations may not always be 100% accurate.