⁹Karl Polanyi, Trade and Market in the Early Empire.  (New York: Free Press, 1957), p. 243; J.G. Crane and M.V. Angrosino, Field Projects in Anthropology:  A Student Handbook.  (Ill.:  Scott, Foresman and Company, 1974.

                ¹⁰J.C. Mitchell, "The Concept and Use of Social Network," Social Networks in Urban Situation.  (London:  Butler and Tamers, 1969), pp. 1-30;  ดำรงค์ ฐานดี, มานุษยวิทยาเบื้องต้น.  (กรุงเทพฯ:  โรงพิมพ์ชวนพิมพ์, 2536),  หน้า 116-127.

                ¹¹W. James Pophams, Educational Evaluation.  (Boston:  Allyn and Bacon, 1993), pp. 41-46.

                ¹²J.G. Crane and M.V. Angrosino, Field Projects in Anthropology: A Student Handbook.  (Ill.:  Scott, Foresman and Company, 1974)