@book{6032,
	author = {Case, Karl E.},
	title = {Principles of economics},
	publisher = {Pearson Education Publisher},
	year = {2014},
	address = {United States of America},
	edition = {9th},
	url = {https://www.libgen.is/book/index.php?md5=77B7846D76DE8B2F342E7D17B9A90751}
}