APA (7th ed.) Citation

Untermann, R. K. (1973). Grade easy: An introductory course in the principles and practices of grading and drainage. Landscape Architecture Foundation.

Chicago Style (17th ed.) Citation

Untermann, Richard K. Grade Easy: An Introductory Course in the Principles and Practices of Grading and Drainage. Vienna, Va: Landscape Architecture Foundation, 1973.

MLA (9th ed.) Citation

Untermann, Richard K. Grade Easy: An Introductory Course in the Principles and Practices of Grading and Drainage. Landscape Architecture Foundation, 1973.