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Oxford University Press, 2007
Buku Teks
Keller, Bernard G., author
University of Mississippi, 1969
Buku Teks
KAT International Marketing Service, 1972
Buku Referensi
American Pharmaceutical Association, 1983
Buku Referensi
edited by Satinder Ahuja, Stephen Scypinski
Elsevier/Academic Press, 2011
Buku Referensi