Wollheim, R. (1978). Art and its objects. Penguin Books.
Chicago-Zitierstil (17. Ausg.)Wollheim, Richard. Art and Its Objects. Harmondsworth: Penguin Books, 1978.
MLA-Zitierstil (8. Ausg.)Wollheim, Richard. Art and Its Objects. Penguin Books, 1978.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.