Principles of ecommerce/ ebusiness: : [ theories and applications]/ 
Orcullo, Norberto A. Jr. 
 -  Rex Book Store,  2009 
 - xvi, 257 p. 
978-9-71235491-5
Electronic commerce.
F 658.84 Or19 2009
                        978-9-71235491-5
Electronic commerce.
F 658.84 Or19 2009