@book{10,
	author = {Krugman, Paul R., and Obstfeld, Maurice,},
	title = {International trade :},
	publisher = {Pearson, },
	year = {c2018.},
	address = {Harlow, England :},
	edition = {11th ed.},
	note = {This edition is the trade split from the eleventh edition of International economics by Paul R. Krugman published in 2017.}
}