Lua APA (7ú heag.)

Voskuil, W. H. 1. [. o. c. (1958). Fuels and power in manufacturing industries. Division of the State Geological Survey.

Lua i Stíl Chicago (17ú heag.)

Voskuil, Walter Henry 1892- [from old catalog]. Fuels and Power in Manufacturing Industries. Urbana: Division of the State Geological Survey, 1958.

Lua MLA (9ú heag.)

Voskuil, Walter Henry 1892- [from old catalog]. Fuels and Power in Manufacturing Industries. Division of the State Geological Survey, 1958.

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