Calloway, J. (2007). Work like you're showing off !: The joy, jazz, and kick of being better tomorrow than you were today. Hoboken, N.J: John Wiley & Sons.
Dyfyniad Arddull ChicagoCalloway, Joe. Work Like You're Showing Off !: The Joy, Jazz, and Kick of Being Better Tomorrow Than You Were Today. Hoboken, N.J: John Wiley & Sons, 2007.
Dyfyniad MLACalloway, Joe. Work Like You're Showing Off !: The Joy, Jazz, and Kick of Being Better Tomorrow Than You Were Today. Hoboken, N.J: John Wiley & Sons, 2007.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.