Dyfyniad APA

British Science Guild. A catalogue of british scientific and technical books.

Dyfyniad Arddull Chicago

British Science Guild. A Catalogue of British Scientific and Technical Books.

Dyfyniad MLA

British Science Guild. A Catalogue of British Scientific and Technical Books.

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