Drucker, P. (2000). Different rainbows. London: Central Books.
Dyfyniad Arddull ChicagoDrucker, Peter. Different Rainbows. London: Central Books, 2000.
Dyfyniad MLADrucker, Peter. Different Rainbows. London: Central Books, 2000.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.