It's probably fine and won't matter at all. I didn't have all of their emails and personal phone numbers info and it still worked out. You might as well just google the organizational addresses and phone numbers and put them in, though. There's no real reason not to.
Thank you so much everyone. I also was wondering that for example if I worked at a library and also got an award for best employee then can I list under experience "library assistant" and then under achievements "best employee award"? Or should I list the award under the experience?