Dyfyniad APA

Jones, W. (1963). Minerals in industry (4th ed.). Penguin books.

Dyfyniad Arddull Chicago

Jones, W.R. Minerals in Industry. 4th ed. Battimore: Penguin books, 1963.

Dyfyniad MLA

Jones, W.R. Minerals in Industry. 4th ed. Penguin books, 1963.

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