Collard, S. B. (2024). Birding for boomers: And everyone else brave enough to embrace the world's most rewarding and frustrating activity (First edition.). Mountaineers Books.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Collard, Sneed B. Birding for Boomers: And Everyone Else Brave Enough to Embrace the World's Most Rewarding and Frustrating Activity. First edition. Seattle, WA: Mountaineers Books, 2024.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Collard, Sneed B. Birding for Boomers: And Everyone Else Brave Enough to Embrace the World's Most Rewarding and Frustrating Activity. First edition. Mountaineers Books, 2024.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.