Citazione Stile APA (7a Edizione)

Hoover, E. M. (1971). An introduction to regional economics. Alfred A. Knoff.

Citazione stile Chigago Style (17a edizione)

Hoover, Edgar M. An Introduction to Regional Economics. New York: Alfred A. Knoff, 1971.

Citatione MLA (9a ed.)

Hoover, Edgar M. An Introduction to Regional Economics. Alfred A. Knoff, 1971.