Carroll, John B.
Study of language survey of linguistics and related diciplines in America / John B. Carroll
Harvad University Press, 1953
 Buku Referensi
Andresen, Tetel Julie
Linguistics in America, 1769-1924: a critical history
Routledge, 1990
 Buku Teks
Dewhurst, J. Frederic
America's needs and resources : a new survey
Twentieth Century Fund, 1955
 Buku Teks
Herling, John
Labor unions in America / John Herling
Robert B. Luce, Inc., 1964
 Buku Teks
Head, Sydney W.
Broadcasting in America : a survey of television, radio, and new technologies
Houghton Miffiln, 1972
 Buku Teks