Dyfyniad APA

Hill, R. H. (1971). dictionary of difficult words. Hutchinson.

Dyfyniad Arddull Chicago

Hill, Robert H. Dictionary of Difficult Words. London: Hutchinson, 1971.

Dyfyniad MLA

Hill, Robert H. Dictionary of Difficult Words. Hutchinson, 1971.

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