- https://play.google.com/store/apps/details?id=de.whsoft.buchhai&utm_source=global_co&utm_medium=prtnr&utm_content=Mar2515&utm_campaign=PartBadge&pcampaignid=MKT-AC-global-none-all-co-pr-py-PartBadges-Oct1515-1
- https://itunes.apple.com/de/app/buchhai/id1149377335?ls=1&mt=8
- https://www.whsoft.de/
- https://www.buchfreund.de/
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