| Business | Phone |
| Able-Astor 21021 Devonshire St # 206, Chatsworth 91311 | (818) 998-0255 |
| Accent On Research 21021 Devonshire St # 202, Chatsworth 91311 | (818) 882-8351 |
| Lawrence Rubin Assoc 9800 Topanga Canyon Blvd, Chatsworth 91311 | (818) 592-6256 |
| Direct Marketing Gold 21601 Devonshire St # 207, Chatsworth 91311 | (818) 725-5050 |
| Gross Marketing Research 10711 Baile Ave, Chatsworth 91311 | (818) 831-1905 |
| J D Powers & Assoc 21810 Nordhoff St, Chatsworth 91311 | (818) 407-4880 |
| Pear Tree Ventures Inc Chatsworth 91311 | (818) 709-2905 |