Spector, L. Unleash the ultimate word undo. PC World Philippines.
Cita Chicago (17th ed.)Spector, Lincoln. "Unleash the Ultimate Word Undo." PC World Philippines .
Cita MLA (9th ed.)Spector, Lincoln. "Unleash the Ultimate Word Undo." PC World Philippines, .
Atenció: Aquestes cites poden no estar 100% correctes.