Washington Post - The US Congress Votes Database: Donald Manzullo
- Features complete voting record along with a brief biography, roles in Congress and financial disclosure statement.
- http://projects.washingtonpost.com/congress/members/m001138/

SourceWatch Congresspedia - Donald Manzullo
- Encyclopedia article focused on his political career along with background data and links to additional articles and resources.
- http://www.sourcewatch.org/index.php?title=Donald_Manzullo

Project Vote Smart - Representative Donald A. Manzullo (IL-16)
- Provides a biography, committee assignments, campaign finances, voting record, issue positions, interest group ratings, speeches and public statements.
- http://www.vote-smart.org/bio.php?can_id=H1163103

OpenSecrets.org - Don Manzullo
- Career profile of campaign funds raised and spent.
- http://www.opensecrets.org/politicians/allsummary.asp?CID=N00004905

Wikipedia - Donald A. Manzullo
- Hyperlinked encyclopedia entry provides a personal and political profile of the US Representative for Illinois.
- http://en.wikipedia.org/wiki/Donald_A._Manzullo

On the Issues - Illinois Representative Donald Manzullo
- Provides quotes and background on various international, domestic, economic and social issues. Includes profile, contact data, forum and HouseMatch.
- http://www.ontheissues.org/IL/Donald_Manzullo.htm

FEC - Candidate Summary Reports: Donald A. Manzullo
- Official campaign finance reports and data from the Federal Election Commission.
- http://herndon1.sdrdc.com/cgi-bin/can_detail/H0IL16085

Biographical Directory of the United States Congress - Donald A. Manzullo
- Short biography along with political party, years of service in Congress and bibliography.
- http://bioguide.congress.gov/scripts/biodisplay.pl?index=m001138