Cita APA (7a ed.)

Duffus, R. L. (1946). The valley and its people: A portrait of TVA. Alfred A. Knopf.

Cita Chicago Style (17a ed.)

Duffus, R. L. The Valley and Its People: A Portrait of TVA. New York: Alfred A. Knopf, 1946.

Cita MLA (9a ed.)

Duffus, R. L. The Valley and Its People: A Portrait of TVA. Alfred A. Knopf, 1946.