@book{57400,
	author = {Nicolson, Harold,},
	title = {Diplomacy \},
	publisher = {Oxford University Press,},
	year = {1950.},
	series = {Home university library of modern knowledge ;},
	address = {London ;},
	edition = {Second Edition},
	url = {https://fll.law.cu.edu.eg/fulltext/bks/B11-06534.pdf}
}