Heady, Earl O., author
Iowa State University Press, 1969
Buku Teks
Nakamura, James I., author
Princeton University Press, 1966
Buku Teks
Bauer, P.T., author
Frederick A. Praeger, 1961
Buku Teks
Griffiths, Brian, author
Praeger , 1972
Buku Teks
Lewis, William Arthur, 1915-, author
Harper & Row, 1966
Buku Teks