California Courts Self-Help Center:
http://www.courtinfo.ca.gav/selfhelp/family/

Los Angeles Superior Court Family Law Self-Help:
http://www.lasuperiorcourtorg/familylaw/

Los Angeles County Child Support Services Department (CSSD):
http://childsupport.cola.ca.us/

California Department of Child Support Services
http://www.childsup.ca.gov/

Federal Office of Child Support Enforcement
http://www.acf.hhs.gov/programs/cse/