Nikolaidis, P. T., Onywera, V. O. & Knechtle, B. (2017). Running performance, nationality, sex, and age in the 10-km, half-marathon, marathon, and the 100-km ultramarathon IAAF 1999-2015. The Journal of Strength and Conditioning Research, 31 (8), 2189-2207. doi: 10.1519/JSC.0000000000001687
APA (7th ed.) CitationNikolaidis, P. T., Onywera, V. O., & Knechtle, B. (2017). Running performance, nationality, sex, and age in the 10-km, half-marathon, marathon, and the 100-km ultramarathon IAAF 1999-2015. The Journal of Strength and Conditioning Research, 31(8), 2189-2207.
Chicago Style (17th ed.) CitationNikolaidis, P. T., V. O. Onywera, and B. Knechtle. "Running Performance, Nationality, Sex, and Age in the 10-km, Half-marathon, Marathon, and the 100-km Ultramarathon IAAF 1999-2015." The Journal of Strength and Conditioning Research 31, no. 8 (2017): 2189-2207.
MLA (9th ed.) CitationNikolaidis, P. T., et al. "Running Performance, Nationality, Sex, and Age in the 10-km, Half-marathon, Marathon, and the 100-km Ultramarathon IAAF 1999-2015." The Journal of Strength and Conditioning Research, vol. 31, no. 8, 2017, pp. 2189-2207.