Παραπομπή APA

Beach,E F. (1957). Economic models: An exposition. John Wiley and Sons.

Παραπομπή Chicago Style

Beach,E F. Economic Models: An Exposition. New York: John Wiley and Sons, 1957.

Παραπομπή MLA

Beach,E F. Economic Models: An Exposition. John Wiley and Sons, 1957.