APA (7th ed.) Citation

Holtz, W. G. (1969). Soil as an engineering material. United States Department of the Interior.

Chicago Style (17th ed.) Citation

Holtz, Wesley G. Soil as an Engineering Material. Washington, D.C: United States Department of the Interior, 1969.

MLA (9th ed.) Citation

Holtz, Wesley G. Soil as an Engineering Material. United States Department of the Interior, 1969.