Friend, G. (2004). Guide to business planning.
Chicago-čujuhus (17. p.)Friend, Graham. Guide to Business Planning. London, 2004.
MLA-čujuhus (9. p.)Friend, Graham. Guide to Business Planning. 2004.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.