Fisk, G. (1967). Marketing systems: An introductory analysis. Harper & Row.
Chicago Edition CitationFisk, George. Marketing Systems: An Introductory Analysis. London: Harper & Row, 1967.
Cita MLAFisk, George. Marketing Systems: An Introductory Analysis. Harper & Row, 1967.
Atenció: Aquestes cites poden no estar 100% correctes.