APA (7th ed.) Citation

Ryvarden, L., & Gilbertson, R. L. (1993). European polypores. Fungiflora.

Chicago Style (17th ed.) Citation

Ryvarden, Leif, and Robert L. Gilbertson. European Polypores. Oslo: Fungiflora, 1993.

MLA (9th ed.) Citation

Ryvarden, Leif, and Robert L. Gilbertson. European Polypores. Fungiflora, 1993.

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