You can look up process servers in the Process Servers Directory posted by Process Servers International (www.iprocessservers.com/index.asp), in the National Directory for Service of Civil Process (Fort Worth: Knowles) and/or the National Directory of Process Servers (Denver: National Directory of Process Servers, Inc.). The National Directory of Process Servers is also available on Westlaw (NDPS). Another source: The advertisements in the relevant state's legal newspaper or in the front of the state's Lawyers Diary and Manual.