British Standards Institution. (1982). Universal decimal classification: UDC 55 Earth sciences. Geology. Geophysics (2nd English full ed.). The Institution.
Citazione stile Chigago Style (17a edizione)British Standards Institution. Universal Decimal Classification: UDC 55 Earth Sciences. Geology. Geophysics. 2nd English full ed. London: The Institution, 1982.
Citatione MLA (8a ed.)British Standards Institution. Universal Decimal Classification: UDC 55 Earth Sciences. Geology. Geophysics. 2nd English full ed. The Institution, 1982.
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