Kaufman, L., & Straus, J. (2021). The blue book of grammar and punctuation: An easy-to-use guide with clear rules, real-world examples, and reproducible quizzes (Twelfth edition.). Jossey-Bass.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Kaufman, Lester, و Jane Straus. The Blue Book of Grammar and Punctuation: An Easy-to-use Guide with Clear Rules, Real-world Examples, and Reproducible Quizzes. Twelfth edition. Hoboken, NJ: Jossey-Bass, 2021.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Kaufman, Lester, و Jane Straus. The Blue Book of Grammar and Punctuation: An Easy-to-use Guide with Clear Rules, Real-world Examples, and Reproducible Quizzes. Twelfth edition. Jossey-Bass, 2021.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.