Sijthoff, 1973
Buku Teks
Bellamy, C. W.
Sweet and Maxwell, 1978
Buku Teks
Alexander, Willy
Kluwer Harrap Handbooks, 1973
Buku Teks
edited by D. J. Gijlstra and D. F. Murphy
Kluwer, 1984
Buku Teks
Cunningham, James P., author
Kogan Page, 1973
Buku Teks