Pfeiffer, John E., author
Harper & Row, 1969
Buku Teks
Wendt, Herbert, author
Houghton-Mifflin, 1956
Buku Teks
Geist, Valerius
Springer-Verlag, 1978
Buku Teks
Sherrard, Philip.
Time-Life International, 1967
Buku Teks
Constable, George
Time-life Int. (Nederland)B.V., 1974
Buku Teks