Martinek, M. (1991). Moderne vertragstypen. C. H. Beck.
Tohutoru Kātū Chicago (17th ed.)Martinek, Michael. Moderne Vertragstypen. Múnich: C. H. Beck, 1991.
Tohutoro MLA (9th ed.)Martinek, Michael. Moderne Vertragstypen. C. H. Beck, 1991.
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