edited by Peter Warr
Panguin Books, 1978
Buku Teks SO
Gilmer, B. von Haller [Beverly von Haller], 1909-1994
McGraw-Hill, 1967
Buku Teks SO
Auerbach, Alan J.
Brown & Benchmark, 1996
Buku Teks SO
Laird, Donald A.
McGraw-Hill, 1958
Buku Teks SO
Lucas, Bill
Nicholas Brealey Publishing, 2002
Buku Teks SO