Cita APA (7a ed.)

Herdeg, W. (1972). Art in the watermark. Herde.

Cita Chicago Style (17a ed.)

Herdeg, Walter. Art in the Watermark. Zürich: Herde, 1972.

Cita MLA (9a ed.)

Herdeg, Walter. Art in the Watermark. Herde, 1972.