Biswas, N. N. (1993). Principles of telegraphy.
Chicagoスタイル(17版)引用形式Biswas, Nripendra N. Principles of Telegraphy. New Delhi : Media promoters & Publishers, 1993.
MLA(9版)引用形式Biswas, Nripendra N. Principles of Telegraphy. 1993.
警告: この引用は必ずしも正確ではありません.