editor, Jerry Mintz
Macmillan, 1994
Buku Referensi
edited by Robert M. Hashway
Praeger, 1990
Buku Referensi
edited by Daniel Bodansky, Jutta Brunnee and Ellen Hey
University of Oxford Press, 2008
Buku Teks
Graham D. Burrows, Robb O. Stanley, Peter B. Bloom
John Wiley & Sons, 2001
Buku Teks
edited by Michael J. Stevens and Danny Wedding
Brunner-Routledge, 2004
Buku Teks