APA (7th ed.) Citation

Dugdale, R. C., & Alexander, V. (1966). Nitrogen cycle in lakes. [publisher not identified].

Chicago Style (17th ed.) Citation

Dugdale, R. C., and Vera Alexander. Nitrogen Cycle in Lakes. [College, Alaska]: [publisher not identified], 1966.

MLA (9th ed.) Citation

Dugdale, R. C., and Vera Alexander. Nitrogen Cycle in Lakes. [publisher not identified], 1966.