Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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