Macridis, R. C. (1963). Europe: Modern political systems. Prentice-Hall.
Chicago Style (17th ed.) ZitazioaMacridis, Roy C. Europe: Modern Political Systems. Englewood Cliffs: Prentice-Hall, 1963.
MLA (9th ed.) ZitazioaMacridis, Roy C. Europe: Modern Political Systems. Prentice-Hall, 1963.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.