APA

Sohns E. R., Swallen J. R., . (1955). Plants collected in Ecuador by W. H. Camp gramineae. New York: The New York Botanical Garden.

Chicago

Sohns Ernest R, Swallen Jason R, . 1955. Plants collected in Ecuador by W. H. Camp gramineae. New York: The New York Botanical Garden.

Harvard

Sohns E. R., Swallen J. R., . (1955). Plants collected in Ecuador by W. H. Camp gramineae. New York: The New York Botanical Garden.

MLA

Sohns Ernest R, Swallen Jason R, . Plants collected in Ecuador by W. H. Camp gramineae. New York: The New York Botanical Garden. 1955.