Winkler, J. (1972). Winkler on marketing planning. Hutchinson.
Chicago Edition CitationWinkler, John. Winkler on Marketing Planning. London: Hutchinson, 1972.
Cita MLAWinkler, John. Winkler on Marketing Planning. Hutchinson, 1972.
Atenció: Aquestes cites poden no estar 100% correctes.