APA aipamena

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

Chicago Style aipamena

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

MLA aipamena

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