(2000, 17. January). Tennis Lessons Library. Zugriff unter https://tennisone.tennisplayer.net/content/Clubs/rubyhills/html/lessonshome.html
APA (7th ed.) CitationTennis Lessons Library.
Chicago Style (17th ed.) CitationTennis Lessons Library.
MLA (9th ed.) CitationTennis Lessons Library.
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