Dyfyniad APA

British Library. (1978). Access to serials. The British Library.

Dyfyniad Arddull Chicago

British Library. Access to Serials. London: The British Library, 1978.

Dyfyniad MLA

British Library. Access to Serials. The British Library, 1978.

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