McDougall, L. (2021). The ultimate guide to hiking: More than 100 essential skills on campsites, gear, wildlife, map reading, and more. Skyhorse Publishing.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)McDougall, Len. The Ultimate Guide to Hiking: More than 100 Essential Skills on Campsites, Gear, Wildlife, Map Reading, and More. New York, NY: Skyhorse Publishing, 2021.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)McDougall, Len. The Ultimate Guide to Hiking: More than 100 Essential Skills on Campsites, Gear, Wildlife, Map Reading, and More. Skyhorse Publishing, 2021.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.