APA (7th ed.) Citation

Tønsberg, T. (1992). The sorediate and isidiate, corticolous, crustose Lichens in Norway. University, Botanical Garden and Museum.

Chicago Style (17th ed.) Citation

Tønsberg, Tor. The Sorediate and Isidiate, Corticolous, Crustose Lichens in Norway. Oslo: University, Botanical Garden and Museum, 1992.

MLA (9th ed.) Citation

Tønsberg, Tor. The Sorediate and Isidiate, Corticolous, Crustose Lichens in Norway. University, Botanical Garden and Museum, 1992.