Kephart, W. M., & Zellner, W. W. (1991). Extraordinary groups: An examination of unconventional lifestyles (Fourth edition.). St. Martin's Press.
Citace podle Chicago (17th ed.)Kephart, William M., a W. W. Zellner. Extraordinary Groups: An Examination of Unconventional Lifestyles. Fourth edition. New York: St. Martin's Press, 1991.
Citace podle MLA (9th ed.)Kephart, William M., a W. W. Zellner. Extraordinary Groups: An Examination of Unconventional Lifestyles. Fourth edition. St. Martin's Press, 1991.
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