Gummesson, E. (1999). Total relationship marketing from the 4Ps of traditional marketing management to the 30Rs of the new marketing paradigm. Butterworoth-Heinemann.
Lua i Stíl Chicago (17ú heag.)Gummesson, Evert. Total Relationship Marketing from the 4Ps of Traditional Marketing Management to the 30Rs of the New Marketing Paradigm. Oxford: Butterworoth-Heinemann, 1999.
Lua MLA (9ú heag.)Gummesson, Evert. Total Relationship Marketing from the 4Ps of Traditional Marketing Management to the 30Rs of the New Marketing Paradigm. Butterworoth-Heinemann, 1999.
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