Employment - References

I am not yet ready to tell my current supervisors I am applying for new positions. How should I complete the references section?
Many of my previous supervisors are retired, and I don't know how to contact them. What should I put as contact information?
My references told me they received more than one email. Must they respond to both?
May I list more than three references?
Can I delete the name of a reference I no longer need?
Can telephone references be provided?
My references haven't received the reference surveys. Is there another way to send them?