Bernstein, R. A. (1992). An introduction to political science methods (3rd ed.). Prentice Hall.
Chicago-čujuhus (17. p.)Bernstein, Robert A. An Introduction to Political Science Methods. 3rd ed. Englewood Cliffs: Prentice Hall, 1992.
MLA-čujuhus (9. p.)Bernstein, Robert A. An Introduction to Political Science Methods. 3rd ed. Prentice Hall, 1992.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.