Treffene, B. (1999, 03. June). Heart rate monitoring. Zugriff unter http://csca.org/hrm95.htm
APA (7th ed.) CitationTreffene, B. Heart rate monitoring.
Chicago Style (17th ed.) CitationTreffene, B. Heart Rate Monitoring.
MLA (9th ed.) CitationTreffene, B. Heart Rate Monitoring.
Warning: These citations may not always be 100% accurate.