Fishman, S., & Secor, G. (2026). The public domain: Find and use free content for your website, book, app, music, video, art, and more (11th edition.). Nolo.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Fishman, Stephen, و Glen Secor. The Public Domain: Find and Use Free Content for Your Website, Book, App, Music, Video, Art, and More. 11th edition. El Segundo, CA: Nolo, 2026.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Fishman, Stephen, و Glen Secor. The Public Domain: Find and Use Free Content for Your Website, Book, App, Music, Video, Art, and More. 11th edition. Nolo, 2026.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.