APA (7th ed.) Citation

Johnson, E. J., & Hollenberg, A. H. (1950). Servicing and maintaining farm tractors: By Elmer J. Johnson and Alvin H. Hollenberg. McGraw-Hill.

Chicago Style (17th ed.) Citation

Johnson, Elmer John, and Alvin H. Hollenberg. Servicing and Maintaining Farm Tractors: By Elmer J. Johnson and Alvin H. Hollenberg. New York: McGraw-Hill, 1950.

MLA (9th ed.) Citation

Johnson, Elmer John, and Alvin H. Hollenberg. Servicing and Maintaining Farm Tractors: By Elmer J. Johnson and Alvin H. Hollenberg. McGraw-Hill, 1950.