Hanbury, Harold Grenville, author
Basil Blackwell, 1958
Buku Teks
Packer, Herbert L., author
McGraw-Hill, 1973
Buku Teks
Bander, Edward J., author
Balinger, 1978
Buku Teks
edited by Edward Rubin
Cambridge University Press, 2012
Buku Teks
Lewis, C.S., author
Harper-Collins, 1999
Buku Teks