Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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