West, G., & Ewan, V. J. (1981). Site investigation and construction of the Dinorwic diversion tunnel. Transport and Road Research Laboratory.
Čikaški stil citiranja (17. izdanje)West, G., i V. J. Ewan. Site Investigation and Construction of the Dinorwic Diversion Tunnel. Crowthorne, Berkshire: Transport and Road Research Laboratory, 1981.
MLA način citiranja (9. izdanje)West, G., i V. J. Ewan. Site Investigation and Construction of the Dinorwic Diversion Tunnel. Transport and Road Research Laboratory, 1981.
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