edited by Robert E. Goodin and Philip Pettit
Oxford Blackwell Publishers 1997,
Buku Teks
edited, translated and with an introduction by Roy MacGregor-Hastie
Peter Owen, 1969
Buku Teks SO
Koh, Chang-Soo
International Publishing House, 1987
Buku Teks SO
edited by Stuart Friebert
Longman, 1989
Buku Teks SO
Wang, James C.F.
Prentice-Hall, 1985
Buku Teks SO