Gregg, J. R. Advanced practice in Gregg shorthand. Gregg Pub. Co..
Chicago Style (17th ed.) CitationGregg, John Robert. Advanced Practice in Gregg Shorthand. New York: Gregg Pub. Co..
Cita MLAGregg, John Robert. Advanced Practice in Gregg Shorthand. Gregg Pub. Co..
Atenció: Aquestes cites poden no estar 100% correctes.