Lua APA (7ú heag.)

HAGEL JOHN. (2005). ONLY SUSTAINABLE EDGE. HARVARD BUSINESS SCHOOL PRESS.

Lua i Stíl Chicago (17ú heag.)

HAGEL JOHN. ONLY SUSTAINABLE EDGE. BOSTON: HARVARD BUSINESS SCHOOL PRESS, 2005.

Lua MLA (9ú heag.)

HAGEL JOHN. ONLY SUSTAINABLE EDGE. HARVARD BUSINESS SCHOOL PRESS, 2005.

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