Gaya APA

Clarke, D. (1987). The New Illustrated Science and Invention Encyclopedia Vol.4 (Canal-Coal Mining) . Westport Connecticut: H.S.Stuttman inc Publishers.

Gaya MLA

Clarke, Donald. "The New Illustrated Science and Invention Encyclopedia Vol.4 (Canal-Coal Mining)". Westport Connecticut: H.S.Stuttman inc Publishers, 1987. Text.