edited by Howard Newby
John Wiley & Sons, 1978
Buku Teks SO
edited by Daniel Bodansky, Jutta Brunnee and Ellen Hey
University of Oxford Press, 2008
Buku Teks SO
editor, Brian J. Terry
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Buku Referensi
International Associational of university, 1993
Buku Referensi
editoed by Karl-Eduard von der Heydt, Stanley Keller
Graham & Trotman / Martinus Nijhoff, 1995
Buku Referensi