APA (7th ed.) Citation

St. John, H. (1937). A new Calandrina from the Galapagos Island ([Sonderdr.].).

Chicago Style (17th ed.) Citation

St. John, Harold. A New Calandrina from the Galapagos Island. [Sonderdr.]. 1937.

MLA (9th ed.) Citation

St. John, Harold. A New Calandrina from the Galapagos Island. [Sonderdr.]. 1937.

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