APA (7th ed.) Citation

Mathias, M. E., & Constance, L. (1954). A new species of Eryngium (Umbelliferae) from southern Brazil ([Sonderdr.].).

Chicago Style (17th ed.) Citation

Mathias, Mildred E., and Lincoln Constance. A New Species of Eryngium (Umbelliferae) from Southern Brazil. [Sonderdr.]. 1954.

MLA (9th ed.) Citation

Mathias, Mildred E., and Lincoln Constance. A New Species of Eryngium (Umbelliferae) from Southern Brazil. [Sonderdr.]. 1954.

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