APA (7th ed.) Citation

Heiser, C. B. (1949). Study in the evolution of the sunflower species Helianthus annuus and H. bolanderi. University of California Press.

Chicago Style (17th ed.) Citation

Heiser, Charles Bixler. Study in the Evolution of the Sunflower Species Helianthus Annuus and H. Bolanderi. Berkeley: University of California Press, 1949.

MLA (9th ed.) Citation

Heiser, Charles Bixler. Study in the Evolution of the Sunflower Species Helianthus Annuus and H. Bolanderi. University of California Press, 1949.