Royal Military Academy (Great Britain). (1892). Text book of fortification and military engineering . Printed for H.M. Stationery Off., by Harrison.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Royal Military Academy (Great Britain). Text Book of Fortification and Military Engineering . London: Printed for H.M. Stationery Off., by Harrison, 1892.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Royal Military Academy (Great Britain). Text Book of Fortification and Military Engineering . Printed for H.M. Stationery Off., by Harrison, 1892.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.