Dyfyniad APA

(1974). The Bowker annual of library and book trade information. R.R.Bowker.

Dyfyniad Arddull Chicago

The Bowker Annual of Library and Book Trade Information. New York: R.R.Bowker, 1974.

Dyfyniad MLA

The Bowker Annual of Library and Book Trade Information. R.R.Bowker, 1974.

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