Jefkins, F. W. (1994). Marketing directo. Pirámide.
Chicago Style (17th ed.) CitationJefkins, Frank William. Marketing Directo. Madrid: Pirámide, 1994.
MLA (9th ed.) CitationJefkins, Frank William. Marketing Directo. Pirámide, 1994.
Warning: These citations may not always be 100% accurate.