Lewis, W. (1970). Overhead costs (3rd.). Unwin Univ.
Chicago-čujuhus (17. p.)Lewis, W. Overhead Costs. 3rd. London: Unwin Univ, 1970.
MLA-čujuhus (9. p.)Lewis, W. Overhead Costs. 3rd. Unwin Univ, 1970.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.