APA-referens (7:e uppl.)

Summers, H. B. (1971). A thirty-year History of programs carried on national radio networks in the united states 1926-1956. Arno press.

Chicago-referens (17:e uppl.)

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.

MLA-referens (9:e uppl.)

Summers, Harrison B. A Thirty-year History of Programs Carried on National Radio Networks in the United States 1926-1956. Arno press, 1971.