Richards, Y. (2012). Classification and Types of Geocentric Orbits. Delhi, India : University Publication : World Technologies.
芝加哥风格引文Richards, Yu. Classification and Types of Geocentric Orbits. Delhi, India : University Publication : World Technologies, 2012.
MLA引文Richards, Yu. Classification and Types of Geocentric Orbits. Delhi, India : University Publication : World Technologies, 2012.
警告：这些引文格式不一定是100％准确.