APA (7th ed.) Citation

Wren, J. A., & Wren, G. J. (1979). Motor trucks of America. University of Michigan Press.

Chicago Style (17th ed.) Citation

Wren, James A., and Genevieve J. Wren. Motor Trucks of America. Ann Arbor: University of Michigan Press, 1979.

MLA (9th ed.) Citation

Wren, James A., and Genevieve J. Wren. Motor Trucks of America. University of Michigan Press, 1979.