APA (7th ed.) Citation

Ekman, G., Hosman, J., & Berglund, U. (1966). Perceived brightness as a function of time of darkadaptation.

Chicago Style (17th ed.) Citation

Ekman, Gösta, Jan Hosman, and Ulf Berglund. Perceived Brightness as a Function of Time of Darkadaptation. Stockholm, 1966.

MLA (9th ed.) Citation

Ekman, Gösta, et al. Perceived Brightness as a Function of Time of Darkadaptation. 1966.