Dyfyniad APA

(1997). Biological & argicultural sciences catalogue. London: Kluwer Academic Publishers.

Dyfyniad Arddull Chicago

Biological & Argicultural Sciences Catalogue. London: Kluwer Academic Publishers, 1997.

Dyfyniad MLA

Biological & Argicultural Sciences Catalogue. London: Kluwer Academic Publishers, 1997.

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