APA (7th ed.) Citation

Burns, J. M., & Johnson, F. M. (1967). Esterase polymorphism in natural populations of a sulfur butterfly, colias eurytheme. Science, 156, 93. https://doi.org/10.1126/science.156.3771.93

Chicago Style (17th ed.) Citation

Burns, J. M., and F. M. Johnson. "Esterase Polymorphism in Natural Populations of a Sulfur Butterfly, Colias Eurytheme." Science 156 (1967): 93. https://doi.org/10.1126/science.156.3771.93.

MLA (9th ed.) Citation

Burns, J. M., and F. M. Johnson. "Esterase Polymorphism in Natural Populations of a Sulfur Butterfly, Colias Eurytheme." Science, vol. 156, 1967, p. 93, https://doi.org/10.1126/science.156.3771.93.