@book{88182,
	author = {Dela Cruz, Jairo A.  and Erick James S. Calijan, Cedrick V. Del Rosario, Andrew N. Ferrer, Maria Erika M. Isaga, Gabriel Antonio G. Lopez and Mykel Angelo P. Nava},
	title = {Determining product effectivity: },
	year = {March 2019},
	address = {Marikina City},
	note = {Includes: references}
}