Lenski, Gerhard, author
McGraw-Hill , 1992
Buku Teks
Lenski, Gerhard, author
McGraw-Hill , 1978
Buku Teks
Relethford, John., author
McGraw-Hill Humanities, 2013
Buku Teks
Johnson, Allan G., author
Harcourt Brace, 1986
Buku Teks
Hurd, Geoffrey
Routledge , 1973
Buku Teks