edited by Graham Hollinshead, Peter Nicholls and Stephanie Tailby
Financial Times Professional, 1999
Buku Teks SO
Onong U. [Onong Uchjana] Effendy
Alumni, 1983
Buku Teks SO
edited by Keith Davis and William G. Scott
McGraw-Hill, 1959
Buku Teks
Davis, Keith, 1918-
McGraw-Hill, 1957
Buku Teks SO
Davis, Keith, 1918-
McGraw-Hill, 1957
Buku Teks SO