APA-viite

McCallum, R. I. (1952). Pneumoconiosis of Coal Miners in North East England with Special Reference to the Durham Coalfield.

Chicago-tyylinen lähdeviittaus

McCallum, R. I. Pneumoconiosis of Coal Miners in North East England With Special Reference to the Durham Coalfield. 1952.

MLA-viite

McCallum, R. I. Pneumoconiosis of Coal Miners in North East England With Special Reference to the Durham Coalfield. 1952.

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