Johnson, S. E., & Richaenhaller, J. (1978). Patents relating to mechanization of timber harvesting (4th ed.). Canadian Forestry Service.
Chicago-čujuhus (17. p.)Johnson, S. E., juo J. Richaenhaller. Patents Relating to Mechanization of Timber Harvesting. 4th ed. Ottawa: Canadian Forestry Service, 1978.
MLA-čujuhus (9. p.)Johnson, S. E., juo J. Richaenhaller. Patents Relating to Mechanization of Timber Harvesting. 4th ed. Canadian Forestry Service, 1978.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.
