Perry, J. (1913). Elementary practical mathematics: With numerous exercises for the use of students and especially of mechanical and electrical engineering students. MacMillan and.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Perry, John. Elementary Practical Mathematics: With Numerous Exercises for the Use of Students and Especially of Mechanical and Electrical Engineering Students. London: MacMillan and, 1913.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Perry, John. Elementary Practical Mathematics: With Numerous Exercises for the Use of Students and Especially of Mechanical and Electrical Engineering Students. MacMillan and, 1913.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.