Horton, Paul B.
Appleton-Century-Crofts, 1955
Buku Teks
edited by Paul B. Horton and Gerald R. Leslie
Prentice-Hall, 1975
Buku Teks
Jamrozik, Adam
Cambridge University Press, 2000
Buku Teks
Jamrozik, Adam
Cambridge University Press, 1998
eBooks
Jamrozik, Adam
Cambridge University Press, 1998
eBooks