Alexander, C. (1803). A grammatical system of the English language: Comprehending a plain and familiar scheme, of teaching young gentlemen and ladies the art of speaking and writing correctly their native tongue (7th ed.). I. Thomas and E.T. Andrews.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Alexander, Caleb. A Grammatical System of the English Language: Comprehending a Plain and Familiar Scheme, of Teaching Young Gentlemen and Ladies the Art of Speaking and Writing Correctly Their Native Tongue. 7th ed. Boston: I. Thomas and E.T. Andrews, 1803.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Alexander, Caleb. A Grammatical System of the English Language: Comprehending a Plain and Familiar Scheme, of Teaching Young Gentlemen and Ladies the Art of Speaking and Writing Correctly Their Native Tongue. 7th ed. I. Thomas and E.T. Andrews, 1803.