Westview Press, 1991
Buku Teks
Kahin, George McTurnan, author
A Delta Book, 1967
Buku Teks
Buchanan, Albert Russell, author
Harper & Row, 1964
Buku Teks
Buchanan, A. Russell, author
Harper & Row, [c1964]
Buku Teks
Buchanan, A. Russell, author
Harper & Row, Publishing, 1964
Buku Teks