Hattingh, J. T. (1936). A universal stress sag chart for power line computations. Blackie.
芝加哥风格引文Hattingh, J. T. A Universal Stress Sag Chart for Power Line Computations. London ; Glasgow: Blackie, 1936.
MLA引文Hattingh, J. T. A Universal Stress Sag Chart for Power Line Computations. Blackie, 1936.
警告：这些引文格式不一定是100％准确.