Leffingwell, W. (1975). Text book of office management (3rd.). McGraw Hill.
Chicago-čujuhus (17. p.)Leffingwell, W. Text Book of Office Management. 3rd. New Delhi: McGraw Hill, 1975.
MLA-čujuhus (9. p.)Leffingwell, W. Text Book of Office Management. 3rd. McGraw Hill, 1975.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.