Francis, P. (1977). principles of R & D management. ACON.
Chicago-čujuhus (17. p.)Francis, Philip. Principles of R & D Management. New York: ACON, 1977.
MLA-čujuhus (9. p.)Francis, Philip. Principles of R & D Management. ACON, 1977.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.