Cita APA (7th ed.)

Hoelscher, R. P., & Springer, C. H. (1963). Engineering drawing and geometry (2a. ed.). John Wiley.

Cita Chicago (17th ed.)

Hoelscher, Randolph Philip, i Clifford Harry Springer. Engineering Drawing and Geometry. 2a. ed. Nueva York: John Wiley, 1963.

Cita MLA (9th ed.)

Hoelscher, Randolph Philip, i Clifford Harry Springer. Engineering Drawing and Geometry. 2a. ed. John Wiley, 1963.