APA (7th ed.) Citation

Leonards, G. A., & Altschaeffl, A. G. (1960). Subsurface materials of Marion County, Indiana. School of Civil Engineering, Purdue University.

Chicago Style (17th ed.) Citation

Leonards, G. A., and A. G. Altschaeffl. Subsurface Materials of Marion County, Indiana. Lafayette, Ind.: School of Civil Engineering, Purdue University, 1960.

MLA (9th ed.) Citation

Leonards, G. A., and A. G. Altschaeffl. Subsurface Materials of Marion County, Indiana. School of Civil Engineering, Purdue University, 1960.