Gaya APA
Macridis, R, C., Ward, R, E. (1972).
Modern Political Systems: Europe (3).
United States of America:
Prentice Hall.
Gaya MLA
Macridis, Roy, C.., Ward, Robert, E..
"Modern Political Systems: Europe".
3
United States of America:
Prentice Hall,
1972.
Texts.