Royal Academy of Arts (Great Britain) & Sotheby, Parke-Bernet Los Angeles. (1978). Selected works of art from the Robert von Hirsch collection. Sotheby's.
Dyfyniad Arddull ChicagoRoyal Academy of Arts (Great Britain) and Parke-Bernet Los Angeles Sotheby. Selected Works of Art from the Robert Von Hirsch Collection. London: Sotheby's, 1978.
Dyfyniad MLARoyal Academy of Arts (Great Britain) and Parke-Bernet Los Angeles Sotheby. Selected Works of Art from the Robert Von Hirsch Collection. Sotheby's, 1978.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.