Gaya APA

Hoover, E, M., Giarratani, F. (1971). An Introduction to Regional Economics (Third Edition, 1985). New York: Alfred A. Knopf.

Gaya MLA

Hoover, Edgar, M.., Giarratani, Frank. "An Introduction to Regional Economics". Third Edition, 1985 New York: Alfred A. Knopf, 1971. Text.