APA (7th ed.) Citation

Cook, P., & Brazell, I. (1977). The superhelical density of nuclear DNA from human cells.

Chicago Style (17th ed.) Citation

Cook, P., and I. Brazell. The Superhelical Density of Nuclear DNA from Human Cells. 1977.

MLA (9th ed.) Citation

Cook, P., and I. Brazell. The Superhelical Density of Nuclear DNA from Human Cells. 1977.