Cita APA (7th ed.)

(1992). Visual communication: By Helmut Löhr and some friends (1. ed.). Löhr [Selbstverl.].

Cita Chicago (17th ed.)

Visual Communication: By Helmut Löhr and Some Friends. 1. ed. [Düsseldorf]: Löhr [Selbstverl.], 1992.

Cita MLA (8th ed.)

Visual Communication: By Helmut Löhr and Some Friends. 1. ed. Löhr [Selbstverl.], 1992.