Cita APA (7a ed.)

Herdeg, W. (1981). Graphis Diagrams (4a. ed.). Graphis Press.

Cita Chicago Style (17a ed.)

Herdeg, Walter. Graphis Diagrams. 4a. ed. Zurich: Graphis Press, 1981.

Cita MLA (9a ed.)

Herdeg, Walter. Graphis Diagrams. 4a. ed. Graphis Press, 1981.