Παραπομπή APA

Tomkeieff, S. I. (1954). Coals and bitumens and related fossil carbonaceous substances: Nomenclature and classification. London: Pergamon Press.

Παραπομπή Chicago Style

Tomkeieff, S. I. Coals and Bitumens and Related Fossil Carbonaceous Substances: Nomenclature and Classification. London: Pergamon Press, 1954.

Παραπομπή MLA

Tomkeieff, S. I. Coals and Bitumens and Related Fossil Carbonaceous Substances: Nomenclature and Classification. London: Pergamon Press, 1954.

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