Trager, Frank N.
Frederick A. Preager, 1966
Buku Teks
Thompson, Willard Scott, 1942-
University of Queensland Press, 1977
Buku Teks
edited by Walter Capps
Routledge, 1991
Buku Teks SO
Hanoi : Democratic Republic of Vietnam
Majalah, Jurnal, Buletin
edited by W. Scott Thompson and Donaldson D. Frizzell
Crane, Russak, 1977
Buku Teks