Lua APA (7ú heag.)

ELKINGTON JOHN. (2008). POWER OF UNREASONABLE PEOPLE. HARVARD BUSINESS SCHOOL PRESS.

Lua i Stíl Chicago (17ú heag.)

ELKINGTON JOHN. POWER OF UNREASONABLE PEOPLE. BOSTON: HARVARD BUSINESS SCHOOL PRESS, 2008.

Lua MLA (9ú heag.)

ELKINGTON JOHN. POWER OF UNREASONABLE PEOPLE. HARVARD BUSINESS SCHOOL PRESS, 2008.

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