Canfield, J. (2004). Kekuatan dari fokus (The power of focus). Karisma Press.
Chicago Style (17th ed.) CitationCanfield, Jack. Kekuatan Dari Fokus (The Power of Focus). Karisma Press, 2004.
MLA (8th ed.) CitationCanfield, Jack. Kekuatan Dari Fokus (The Power of Focus). Karisma Press, 2004.
Warning: These citations may not always be 100% accurate.