APA (7th ed.) Citation

Liljedahl, J. B., & Barger, E. L. (1979). Tractors and their power units (3d ed.). Wiley.

Chicago Style (17th ed.) Citation

Liljedahl, John B., and E. L. Barger. Tractors and Their Power Units. 3d ed. New York: Wiley, 1979.

MLA (9th ed.) Citation

Liljedahl, John B., and E. L. Barger. Tractors and Their Power Units. 3d ed. Wiley, 1979.