Leinwand, Gerald
Washington Square Press, 1970
Buku Teks
Buskirk, Richard Hobart, 1927-, author
McGraw-Hill, 1992
Buku Teks
Hobbs, Thomas, author
Periplus, 1999
Buku Referensi
Hickey, Gerald Connon
Yale University Press, 1967
Buku Teks
Leinwand, Gerald
Allynand Bacon, Inc., 1974
Buku Teks