@book{1155,
	author = {Billings, Evelyn. and Westmore, Ann.},
	title = {The Billings method of Natural Family Planning :},
	publisher = {Random House,},
	year = {c1980.},
	address = {New York :},
	edition = {1st American ed.},
	note = {Reprint. Originally published: Richmond, Victoria, Australia : A. O'Donovan, 1980.}
}