(1990). Foundry energy conservation workbook: Fall 1990.
Chicago-čujuhus (17. p.)Foundry Energy Conservation Workbook: Fall 1990. 1990.
MLA-čujuhus (9. p.)Foundry Energy Conservation Workbook: Fall 1990. 1990.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.