Cita APA (7th ed.)
Summers, H. B. (1971). A thirty-year History of programs carried on national radio networks in the united states 1926-1956. Arno press.
Cita Chicago (17th ed.)
Summers, Harrison B. A Thirty-year History of Programs Carried on National Radio Networks in the United States 1926-1956. New York: Arno press, 1971.
Cita MLA (9th ed.)
Summers, Harrison B. A Thirty-year History of Programs Carried on National Radio Networks in the United States 1926-1956. Arno press, 1971.
Atenció: Aquestes cites poden no estar 100% correctes.