APA (7th ed.) Citation

Udall, S. L. (1963). The conservation challenge of the sixties. University of California, School of Forestry.

Chicago Style (17th ed.) Citation

Udall, Stewart L. The Conservation Challenge of the Sixties. [Berkeley]: University of California, School of Forestry, 1963.

MLA (9th ed.) Citation

Udall, Stewart L. The Conservation Challenge of the Sixties. University of California, School of Forestry, 1963.