APA
Puri R., . (1997). Antarctica: A natural reserve. A study in international envi. Shimla: Indian Institute of Advanced Study.
Chicago
Puri Rama, . 1997. Antarctica: A natural reserve. A study in international envi. Shimla: Indian Institute of Advanced Study.
Harvard
Puri R., . (1997). Antarctica: A natural reserve. A study in international envi. Shimla: Indian Institute of Advanced Study.
MLA
Puri Rama, . Antarctica: A natural reserve. A study in international envi. Shimla: Indian Institute of Advanced Study. 1997.