Parr, G. D. A. (1901). Practical electrical testing in physics and electrical engineering: Being a course suitable for first and second year students and others. Longmans, Green.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Parr, George Dudley Aspinall. Practical Electrical Testing in Physics and Electrical Engineering: Being a Course Suitable for First and Second Year Students and Others. London ; New York: Longmans, Green, 1901.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Parr, George Dudley Aspinall. Practical Electrical Testing in Physics and Electrical Engineering: Being a Course Suitable for First and Second Year Students and Others. Longmans, Green, 1901.
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