APA (7th ed.) Citation

Davidson, J. F. (1950). The genus Polemonium, Tournefort, L. University of California Press.

Chicago Style (17th ed.) Citation

Davidson, John Fraser. The Genus Polemonium, Tournefort, L. Berkeley: University of California Press, 1950.

MLA (9th ed.) Citation

Davidson, John Fraser. The Genus Polemonium, Tournefort, L. University of California Press, 1950.