edited by Peter Warr
Panguin Books, 1978
Buku Teks
Gilmer, B. von Haller (Beverly von Haller), 1909-1994
McGraw-Hill, 1967
Buku Teks
Auerbach, Alan J.
Brown & Benchmark, 1996
Buku Teks
Laird, Donald A.
McGraw-Hill, 1958
Buku Teks
Blum, Milton L.
Harper & Row, 1968
Buku Teks