1.
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Oxford: Oxford University Press, 2020
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2.
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Geneva, Switzerland : International Labour Office, 1987.
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3.
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Bern : Stämpfli, 1998.
German | N 631 PLA.G |
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4.
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Bern : Stämpfli, 1995.
German | N 13 REH.A |
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5.
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Menlo Park, CA : Ladera Press, c1994.
English | N 637 BRI.M |
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6.
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London : Butterworths, 1993. Fourth edition.
English | N 742 CLA.P(4) |
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7.
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London : Unwin Hyman, 1988. Third edition.
English | N 742 CLA.P (3) |
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8.
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Fribourg, Suisse : Editions universitaires, 1985.
French | N 742 PED.C |
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9.
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[München] : Deutscher Taschenbuch Verlag, [1987]
German | N 16 HIL.U |
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10.
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München : C.H. Beck, 1984. Second edition.
German | N 621 BAP.V |
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