Dyfyniad APA

(1997). Springer CD-ROM. Catalogue 97/98 of all books, journals and electronic media.

Dyfyniad Arddull Chicago

Springer CD-ROM. Catalogue 97/98 of All Books, Journals and Electronic Media. 1997.

Dyfyniad MLA

Springer CD-ROM. Catalogue 97/98 of All Books, Journals and Electronic Media. 1997.

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