Sayrs, W. C. (1903). Practical grammar: Based upon the text of Longfellow's "Evangeline" and a selection from Prescott's "Conquest of Mexico". Lothrop Pub. Co..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Sayrs, William Christopher. Practical Grammar: Based upon the Text of Longfellow's "Evangeline" and a Selection from Prescott's "Conquest of Mexico". Boston: Lothrop Pub. Co., 1903.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Sayrs, William Christopher. Practical Grammar: Based upon the Text of Longfellow's "Evangeline" and a Selection from Prescott's "Conquest of Mexico". Lothrop Pub. Co., 1903.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.