edited by A. Houghton Brodrick
Frederick A. Praeger, 1972
Buku Teks
Sharp, David, author
Bay Books, 1984
Buku Referensi
Sharp, David, author
Bay Books, 1984
Buku Referensi
Sharp, David, author
Bay Books, 1984
Buku Referensi
Victor Arthur Rice...[et al.]
McGraw-Hill, 1957
Buku Teks