Koerner, H., & Chase, A. W. (2014). Hal Koerner's field guide to Ultrarunning: Training for an Ultramarathon, from 50K to 100 miles and beyond. VeloPress.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रKoerner, Hal, और Adam W. Chase. Hal Koerner's Field Guide to Ultrarunning: Training for an Ultramarathon, from 50K to 100 Miles and Beyond. Boulder, Colorado: VeloPress, 2014.
एमएलए (8वां संस्करण) प्रशस्ति पत्रKoerner, Hal, और Adam W. Chase. Hal Koerner's Field Guide to Ultrarunning: Training for an Ultramarathon, from 50K to 100 Miles and Beyond. VeloPress, 2014.
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