Dyfyniad APA

Cheney, O. H. (1949). Economic survey of the book industry, 1930-1931. R. R. Bowker.

Dyfyniad Arddull Chicago

Cheney, Orion Howard. Economic Survey of the Book Industry, 1930-1931. New York: R. R. Bowker, 1949.

Dyfyniad MLA

Cheney, Orion Howard. Economic Survey of the Book Industry, 1930-1931. R. R. Bowker, 1949.

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