uLIBRARY
Ulverscroft Group Limited
Libby由OverDrive赛阅提供
OverDrive, Inc.
BorrowBox Library
Bolinda digital
hoopla Digital
Midwest Tape LLC
cloudLibrary
OCLC
Audiobooks.com: Books & More
Storytel Audiobooks USA LLC
Google Play 图书
Google LLC
ePlatform Digital Libraries
Wheelers ePlatform
Audible – 亚马逊有声读物
Audible, Inc.
Everand: Ebooks and audiobooks
Scribd, Inc.