Ryan, William T.
A Guide to marketing / William T. Ryan
Richard D. Irwin, 1981
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Ryan, William T
Principles of marketing/ by William Ryan
Richard D. Irwin, 1980
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Hise, Richard T.
Basic marketing : concepts and decisions
Winthrop, 1979
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Cox, William E. Jr.
Industrial marketing research/ William E. Cox, Jr
N.Y. John Wiley c., 1979
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Hoffamn, K. Douglas
Essentials of services marketing : concepts, strategies, and cases
Horcourt Colledge Publisher, 2002
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