Herdeg, W. (1991). Graphis photo: The international annual of photography = das internationale jahrbuch der photographie = le répertoire international de la photographie. Graphis Press.
Cita Chicago Style (17a ed.)Herdeg, Walter. Graphis Photo: The International Annual of Photography = Das Internationale Jahrbuch Der Photographie = Le Répertoire International De La Photographie. Zurich: Graphis Press, 1991.
Cita MLA (8a ed.)Herdeg, Walter. Graphis Photo: The International Annual of Photography = Das Internationale Jahrbuch Der Photographie = Le Répertoire International De La Photographie. Graphis Press, 1991.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.