APA (7th ed.) Citation

McGregor, D. D. (1956). Engineering interpretation of agriculture soil maps and correlation with airphoto patterns. Purdue University.

Chicago Style (17th ed.) Citation

McGregor, Duncan Douglass. Engineering Interpretation of Agriculture Soil Maps and Correlation with Airphoto Patterns. Lafayette: Purdue University, 1956.

MLA (9th ed.) Citation

McGregor, Duncan Douglass. Engineering Interpretation of Agriculture Soil Maps and Correlation with Airphoto Patterns. Purdue University, 1956.

Warning: These citations may not always be 100% accurate.