Cita APA (7th ed.)

Douglass, C. E., & Hoag, A. L. (1962). Descriptive geometry. Holt, Rinehart and Winston.

Cita Chicago (17th ed.)

Douglass, Clarence E., i Albert L. Hoag. Descriptive Geometry. Nueva York: Holt, Rinehart and Winston, 1962.

Cita MLA (9th ed.)

Douglass, Clarence E., i Albert L. Hoag. Descriptive Geometry. Holt, Rinehart and Winston, 1962.