Lane, R. E. (1957). Problems in American government: An introduction to political analysis (2d ed.). Prentice-Hall.
Lua i Stíl Chicago (17ú heag.)Lane, Robert Edwards. Problems in American Government: An Introduction to Political Analysis. 2d ed. Englewood Cliffs, N. J: Prentice-Hall, 1957.
Lua MLA (9ú heag.)Lane, Robert Edwards. Problems in American Government: An Introduction to Political Analysis. 2d ed. Prentice-Hall, 1957.
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