@book{66922,
	author = {Singh, R. K.},
	title = {Petrochemical Production Process },
	publisher = {Random Pub,},
	year = {2015.},
	address = {New Delhi:},
	url = {https://books.google.com.pk/books?id=O6sCkAEACAAJ&dq=petrochemical+production+process+singh&hl=en&sa=X&redir_esc=y}
}