APA (7th ed.) Citation

Society of American Foresters & Winters, R. K. (1950). Fifty years of forestry in the U.S.A. [publisher not identified].

Chicago Style (17th ed.) Citation

Society of American Foresters and Robert Kirby Winters. Fifty Years of Forestry in the U.S.A. Washington: [publisher not identified], 1950.

MLA (9th ed.) Citation

Society of American Foresters and Robert Kirby Winters. Fifty Years of Forestry in the U.S.A. [publisher not identified], 1950.