Palen, J. John, author
McGraw-Hill, 1987
Buku Teks
Payne, Geoffrey K., author
Leonard-Hill, 1977
Buku Teks
Clark, David, 1946-, author
Routledge, 1996
Buku Teks
Palen, J. John, author
McGraw-Hill, 1992
Buku Teks
Palen, J. John, author
McGraw-Hill, 1981
Buku Teks