Antretter, M., Posch, D., & Burtscher, M. (2020). The Hatfield-System vs. Weekly Undulating Periodized Strength Training. German Journal of Sports Medicine / Deutsche Zeitschrift fur Sportmedizin, 71(4), 89. https://doi.org/10.5960/dzsm.2020.423
Chicago Style (17th ed.) CitationAntretter, M., D. Posch, and M. Burtscher. "The Hatfield-System Vs. Weekly Undulating Periodized Strength Training." German Journal of Sports Medicine / Deutsche Zeitschrift Fur Sportmedizin 71, no. 4 (2020): 89. https://doi.org/10.5960/dzsm.2020.423.
MLA (9th ed.) CitationAntretter, M., et al. "The Hatfield-System Vs. Weekly Undulating Periodized Strength Training." German Journal of Sports Medicine / Deutsche Zeitschrift Fur Sportmedizin, vol. 71, no. 4, 2020, p. 89, https://doi.org/10.5960/dzsm.2020.423.