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1.
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London : Butterworths, 1994.
English | B 371 BUR.L |
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2.
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Venezuela : Porlamar, 2001.
Spanish | N 635 CAL.O |
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3.
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Editorial, Reus : Madrid, c.2005.
Spanish | N 635 ORT.A |
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4.
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Freiburg : Universitätsverlag Freiburg Schweiz =, 1999.
Fourth edition.
German | B 371 SCH.R(4) |
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5.
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London : Sweet & Maxwell, 1995.
Eleventh edition.
English | B 13 WAL.H(11) |
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