Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (8a ed.)

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