Dyfyniad APA

R.R. Bowker Company. International literary market place. Bowker.

Dyfyniad Arddull Chicago

R.R. Bowker Company. International Literary Market Place. New York,: Bowker.

Dyfyniad MLA

R.R. Bowker Company. International Literary Market Place. Bowker.

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