McDonald, Ray (September 12, 2007). "Keyboardist Joe Zawinul Dies". VOA News. Voice of America. Archived from the original on January 16, 2009. Retrieved January 2, 2009.
McDonald, Ray (September 12, 2007). "Keyboardist Joe Zawinul Dies". VOA News. Voice of America. Archived from the original on January 16, 2009. Retrieved January 2, 2009.