(1992). Visual communication: By Helmut Löhr and some friends (1. ed.). Löhr [Selbstverl.].
Čikaški stil citiranja (17. izdanje)Visual Communication: By Helmut Löhr and Some Friends. 1. ed. [Düsseldorf]: Löhr [Selbstverl.], 1992.
MLA način citiranja (8. izdanje)Visual Communication: By Helmut Löhr and Some Friends. 1. ed. Löhr [Selbstverl.], 1992.
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