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(1) Að svo stöddu geta eingöngu notendur í enskumælandi löndum hlustað á hljóðbækur hjá Spotify.
(2) Google Play Audiobooks er ekki aðgengilegt á Íslandi.
(3) Apple Books er ekki aðgengilegt á Íslandi.
Einkennismerki einstakra hljóðbókarveita eru höfundarréttarvarin og má einungis nota til kynningar á vörum sem seldar eru af viðkomandi þjónustufyrirtækjum. Apple táknmerkið, iPad, og iPhone eru einkennismerki í eigu Apple Inc., og eru skráð í Bandaríkjunum og fleiri löndum. Apple Books er einnig vörumerki Apple Inc.