Ward, M. (1827). Remarks, propositions and calculations: Relative to a railroad and locomotive engines to be used upon the same, from Baltimore to the Ohio River. Printed by J. D. Toy.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ward, Minus. Remarks, Propositions and Calculations: Relative to a Railroad and Locomotive Engines to Be Used upon the Same, from Baltimore to the Ohio River. Baltimore: Printed by J. D. Toy, 1827.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ward, Minus. Remarks, Propositions and Calculations: Relative to a Railroad and Locomotive Engines to Be Used upon the Same, from Baltimore to the Ohio River. Printed by J. D. Toy, 1827.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.