Schönfelder, M., Hinterseher, G., Peter, P., & Spitzenpfeil, P. Scientific Comparison of Different Online Heart Rate Monitoring Systems. Wiley.
Chicago Style (17th ed.) CitationSchönfelder, Martin, Georg Hinterseher, Philipp Peter, and Peter Spitzenpfeil. Scientific Comparison of Different Online Heart Rate Monitoring Systems. Wiley.
MLA (9th ed.) CitationSchönfelder, Martin, et al. Scientific Comparison of Different Online Heart Rate Monitoring Systems. Wiley.
Warning: These citations may not always be 100% accurate.