DUTTA, S. (2003). LET'S KNOW ABOUT POLAR REGIONS. UNICATE PUBLICATIONS.
芝加哥风格引文DUTTA, SHYAMA. LET'S KNOW ABOUT POLAR REGIONS. PUNE: UNICATE PUBLICATIONS, 2003.
MLA引文DUTTA, SHYAMA. LET'S KNOW ABOUT POLAR REGIONS. UNICATE PUBLICATIONS, 2003.
警告：这些引文格式不一定是100％准确.