Lua APA (7ú heag.)

Ritschard, C. (1989). Pierre André Ferrand. Das Kunst-Bulletin.

Lua i Stíl Chicago (17ú heag.)

Ritschard, Claude. "Pierre André Ferrand." Das Kunst-Bulletin 1989.

Lua MLA (8ú heag.)

Ritschard, Claude. "Pierre André Ferrand." Das Kunst-Bulletin, 1989.

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