Gaya APA

Ingersoll, T, G., O'Connor, R, E. (1983). Politics and structure : essential of American National Government (4th ed). Monterey, CA: Brooks/Cole.

Gaya MLA

Ingersoll, Thomas, G.., O'Connor, Robert, E.. "Politics and structure : essential of American National Government". 4th ed Monterey, CA: Brooks/Cole, 1983. Text.