Kohls, Richard L.
Marketing of agricultural products / Richard L. Kohls
Macmillan, 1969
 Buku Teks SO
Kohls, Richard L.
Marketing of agricultural products / Richard L. Kohls
Macmillan, 1971
 Buku Teks SO
Marketing patterns of agricultural commodities in an upland area of Central Java
 Artikel Jurnal
Greer, Thomas V.
Cases in marketing : orientation, analysis, and problems / Thomas V. Greer
Macmillan, 1975
 Buku Teks SO
Fundamentals of marketing : additional dimensions, selections from the literature / edited, Jack L. Taylor, James F. Robb
McGraw-Hill, 1971
 Buku Teks SO