Dyfyniad APA

Widder, R. B. (1966). A Pictorial treasury of the smithsonian institution. Chilton.

Dyfyniad Arddull Chicago

Widder, Robert B. A Pictorial Treasury of the Smithsonian Institution. Philadelphia: Chilton, 1966.

Dyfyniad MLA

Widder, Robert B. A Pictorial Treasury of the Smithsonian Institution. Chilton, 1966.

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.