Henslin, James M.
Social problems
McGraw-Hill, 1983
 Buku Teks
Palen, J. John
Social problems
McGraw-Hill, 1979
 Buku Teks
Brown, Milton P.
Problems in marketing
New York, N.Y. , McGraw-Hill
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Corey, E. Raymond
Problems in marketing
McGraw-Hill, 1981
 Buku Teks
Problems in marketing
by Malclom P. McNair ... [and others]
McGraw-Hill, 1957
 Buku Teks