Perry, T. (1821). An easy grammar of writing: Or, penmanship analyzed. In two parts. Part I.__Containing rules for the formation of letters ... Part II.__Consisting of forms of letters, memorandums ... particularly recommended to schools, apprentices ... (Fourth edition.). Printed for G. and W.B. Whittaker.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Perry, T. An Easy Grammar of Writing: Or, Penmanship Analyzed. In Two Parts. Part I.__Containing Rules for the Formation of Letters ... Part II.__Consisting of Forms of Letters, Memorandums ... Particularly Recommended to Schools, Apprentices ... Fourth edition. London: Printed for G. and W.B. Whittaker, 1821.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Perry, T. An Easy Grammar of Writing: Or, Penmanship Analyzed. In Two Parts. Part I.__Containing Rules for the Formation of Letters ... Part II.__Consisting of Forms of Letters, Memorandums ... Particularly Recommended to Schools, Apprentices ... Fourth edition. Printed for G. and W.B. Whittaker, 1821.