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Industrial buying behavior : a need for an integrative approach
Johnston, Wesley J.; Spekman, Robert E. - In: Journal of business research : JBR 10 (1982) 2, pp. 135-146
Persistent link: https://www.econbiz.de/10003165575
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A strategic approach to business marketing
Spekman, Robert E. (contributor) - 1985
Persistent link: https://www.econbiz.de/10004771900
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Issues in industrial marketing : a view to the future
Spekman, Robert E. (contributor) - 1982
Persistent link: https://www.econbiz.de/10004804379