Seth, P. (1993). An introduction to travel and tourism 1993. Sterling pub.pvt.ltd.
芝加哥风格引文Seth, Prannath. An Introduction to Travel and Tourism 1993. New delhi: Sterling pub.pvt.ltd, 1993.
MLA引文Seth, Prannath. An Introduction to Travel and Tourism 1993. Sterling pub.pvt.ltd, 1993.
警告：这些引文格式不一定是100％准确.