APA aipamena

Untermann, R. K. (1978). Principles and practices of grading, drainage, and road alignment: An ecologic approach. Reston Pub Co.

Chicago Style aipamena

Untermann, Richard K. Principles and Practices of Grading, Drainage, and Road Alignment: An Ecologic Approach. Reston, Va: Reston Pub Co, 1978.

MLA aipamena

Untermann, Richard K. Principles and Practices of Grading, Drainage, and Road Alignment: An Ecologic Approach. Reston Pub Co, 1978.