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توثيق جمعية علم النفس الأمريكية APA (الطبعة السابعة)

Kral, T. (1994). Twelve famous Americans: Reading and listening skills text for students of English as a foreign language (Revised Edition.). Office of English Language Programs.

توثيق أسلوب شيكاغو (الطبعة السابعة عشر)

Kral, Thomas. Twelve Famous Americans: Reading and Listening Skills Text for Students of English as a Foreign Language. Revised Edition. Washington, D.C.: Office of English Language Programs, 1994.

توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)

Kral, Thomas. Twelve Famous Americans: Reading and Listening Skills Text for Students of English as a Foreign Language. Revised Edition. Office of English Language Programs, 1994.