DUNGAN, C., & RIDING, D. (1990). Business law. Barron's.
Lua i Stíl Chicago (17ú heag.)DUNGAN, Christopher, agus Donald RIDING. Business Law. New York: Barron's, 1990.
Lua MLA (9ú heag.)DUNGAN, Christopher, agus Donald RIDING. Business Law. Barron's, 1990.
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