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