Gaya APA

DOUGLASS, C, E., Hoag, A, L. (1962). DESCRIPTIVE GEOMETRY . New York: HOLT, RINEHART AND WINSTON.

Gaya MLA

DOUGLASS, Clarence, E.., Hoag, Albert, L.. "DESCRIPTIVE GEOMETRY". New York: HOLT, RINEHART AND WINSTON, 1962. Textbook.