Rubinstein, A. Z., & Thumn, G. W. (1965). The challenge of politics: Ideas and issues (2nd.ed.). Prentice Hall.
Chicago-čujuhus (17. p.)Rubinstein, Alvin Z., juo Garold W. Thumn. The Challenge of Politics: Ideas and Issues. 2nd.ed. Englewood Cliffs: Prentice Hall, 1965.
MLA-čujuhus (9. p.)Rubinstein, Alvin Z., juo Garold W. Thumn. The Challenge of Politics: Ideas and Issues. 2nd.ed. Prentice Hall, 1965.
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