Nowell, D., & Hills, D. (1989). HERTZIAN CONTACT OF GROUND SURFACES.
芝加哥风格引文Nowell, D., 与 D. Hills. HERTZIAN CONTACT OF GROUND SURFACES. 1989.
MLA引文Nowell, D., 与 D. Hills. HERTZIAN CONTACT OF GROUND SURFACES. 1989.
警告：这些引文格式不一定是100％准确.
APA引文