Warren, e. (1977). Long- range planning: The executive view point. Taraporewala.
Chicago-čujuhus (17. p.)Warren, e. Long- Range Planning: The Executive View Point. Mumbai: Taraporewala, 1977.
MLA-čujuhus (9. p.)Warren, e. Long- Range Planning: The Executive View Point. Taraporewala, 1977.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.