Lipson, L. (1981). The great issues of politics: An introduction to political science (6th ed.). Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Lipson, Leslie. The Great Issues of Politics: An Introduction to Political Science. 6th ed. Englewood Cliffs, N.J.: Prentice-Hall, 1981.
Lua MLA (8ú heag.)Lipson, Leslie. The Great Issues of Politics: An Introduction to Political Science. 6th ed. Prentice-Hall, 1981.
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