APA (7th ed.) Citation

Petersen, J. B. (1923). The fresh-water Cyanophyceae of Iceland: By Johs. Boye Petersen (Sonderdr.). Lunos.

Chicago Style (17th ed.) Citation

Petersen, Johannes Boye. The Fresh-water Cyanophyceae of Iceland: By Johs. Boye Petersen. Sonderdr. København: Lunos, 1923.

MLA (9th ed.) Citation

Petersen, Johannes Boye. The Fresh-water Cyanophyceae of Iceland: By Johs. Boye Petersen. Sonderdr. Lunos, 1923.

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