If you retrieved the eBook from a database or site, include the name of the database.
Author Last name, Author Full First name. Title of eBook. Publisher, Year. Name of Library Database, URL
It is recommended to include the format term "E-book" after the title to indicate the type of resource used.
Meyers, Stephanie. Twilight. E-book, Little, Brown and Company, 2000.
(Author and page)