Lua APA (7ú heag.)

RINGLAND GILL. (2002). SCENARIOS IN BUSINESS. JOHN WILEY AND SONS.

Lua i Stíl Chicago (17ú heag.)

RINGLAND GILL. SCENARIOS IN BUSINESS. U K: JOHN WILEY AND SONS, 2002.

Lua MLA (9ú heag.)

RINGLAND GILL. SCENARIOS IN BUSINESS. JOHN WILEY AND SONS, 2002.

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