Graphis posters 77; the international annual of poster art.

MLA

Herdeg, W. Graphis Posters 77; the International Annual of Poster Art. Zürich: Graphis press corp., 1977.

APA

Herdeg, W. (1977). Graphis posters 77; the international annual of poster art. Zürich: Graphis press corp.

Chicago

Herdeg, W. Graphis Posters 77; the International Annual of Poster Art. Zürich: Graphis press corp., 1977.