Não informado. (2002). Canadian pit and quarry. National Business Publications.
Style de citation Chicago (17e éd.)Não informado. Canadian Pit and Quarry. Gardenvale, Canada: National Business Publications, 2002.
Style de citation MLA (8e éd.)Não informado. Canadian Pit and Quarry. National Business Publications, 2002.
Attention : ces citations peuvent ne pas être correctes à 100%.