Tolosa, Jayson B. Marketing mix strategies of courier and express delivery services in Metro Vigan / Jayson B. Tolosa. - Divine Word College of Laoag : [s.n.], 2021. - xvi, 90 pages : illustrations ; 28 centimeter. Bibliography: pages 75-78. Subjects--Topical Terms: Customer relations. Dewey Class. No.: TH 658.58 T58m 2021