Lua APA (7ú heag.)

Steinhoff, D. (1979). The world of business. Grolier.

Lua i Stíl Chicago (17ú heag.)

Steinhoff, Dan. The World of Business. [Danbury, Conn.]: Grolier, 1979.

Lua MLA (9ú heag.)

Steinhoff, Dan. The World of Business. Grolier, 1979.

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