APA (7th ed.) Citation

Hansen, A. (1973). Floristic notes from Canary Islands (especially La Palma) ([Sonderdr.].).

Chicago Style (17th ed.) Citation

Hansen, Alfred. Floristic Notes from Canary Islands (especially La Palma). [Sonderdr.]. 1973.

MLA (9th ed.) Citation

Hansen, Alfred. Floristic Notes from Canary Islands (especially La Palma). [Sonderdr.]. 1973.

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