Cambridge University Press, 2020
eBooks
edited by S.E. Jorgensen, B. Halling-Sorensen, S.N. Nielsen
Lewis Publishers, 1996
Buku Referensi
edited by O. Hutzinger
Springer-Verlag, 1995
Buku Teks
editor-in-chief, A. Roger Greenway
McGraw-Hill, 2000
Buku Referensi
Charlton, Ruth, author
Lawbook, 2004
Buku Teks