@book{95520,
	author = {Landicho, Elizabeth D.C.  and Alferez, Merle S.},
	title = {MSA Textbook in trigonometry / },
	publisher = {MSA Academic Advancement Institute,},
	year = {c2001. },
	address = { Quezon City :},
	edition = {Year 2001 edition.},
	note = {Includes bibliography. }
}