APA (7th ed.) Citation

Lindsey, A. A., Schmelz, D. V., & Nichols, S. A. (1969). Natural areas in Indiana and their preservation. Indiana Natural Areas Survey, Dept. of Biological Sciences, Purdue University.

Chicago Style (17th ed.) Citation

Lindsey, Alton A., Damian V. Schmelz, and Stanley A. Nichols. Natural Areas in Indiana and Their Preservation. Lafayette: Indiana Natural Areas Survey, Dept. of Biological Sciences, Purdue University, 1969.

MLA (9th ed.) Citation

Lindsey, Alton A., et al. Natural Areas in Indiana and Their Preservation. Indiana Natural Areas Survey, Dept. of Biological Sciences, Purdue University, 1969.