Dyfyniad APA

Anonymous. (1973). US. The sheridan book.

Dyfyniad Arddull Chicago

Anonymous. US. London: The sheridan book, 1973.

Dyfyniad MLA

Anonymous. US. The sheridan book, 1973.

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