APA (7th ed.) Citation

Clausen, J. (1958). Experimental studies on the nature of species. Carnegie Institution of Washington Publication.

Chicago Style (17th ed.) Citation

Clausen, Jens. Experimental Studies on the Nature of Species. Washington, D.C: Carnegie Institution of Washington Publication, 1958.

MLA (9th ed.) Citation

Clausen, Jens. Experimental Studies on the Nature of Species. Carnegie Institution of Washington Publication, 1958.