Ferber, R. (1949). Market research. McGraw Hill.
Chicago Stili AlıntıFerber, Robert. Market Research. New York: McGraw Hill, 1949.
MLA AlıntıFerber, Robert. Market Research. McGraw Hill, 1949.
Uyarı: Bu alıntı herzaman %100 doğru olmayabilir..
Ferber, R. (1949). Market research. McGraw Hill.
Chicago Stili AlıntıFerber, Robert. Market Research. New York: McGraw Hill, 1949.
MLA AlıntıFerber, Robert. Market Research. McGraw Hill, 1949.