Dyfyniad APA

Great Britain. Macdonald Educational Colour Units. (1974). Statistics. Macdonald Educational.

Dyfyniad Arddull Chicago

Great Britain. Macdonald Educational Colour Units. Statistics. London: Macdonald Educational, 1974.

Dyfyniad MLA

Great Britain. Macdonald Educational Colour Units. Statistics. Macdonald Educational, 1974.

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