Ekstrand, J. (2017). Encyclopedia of football medicine. Thieme.
芝加哥风格引文Ekstrand, Jan. Encyclopedia of Football Medicine. Stuttgart, Germany: Thieme, 2017.
MLA引文Ekstrand, Jan. Encyclopedia of Football Medicine. Thieme, 2017.
警告：这些引文格式不一定是100％准确.
APA引文