00331nam a2200121Ia 4500008004100000041000800041082001600049100001800065245002200083260007100105300001200176999002100188231229s2018    xx            000 0 und d  aeng  a658.84bGUP  aGUPTA (Seema)  aDigital Marketing  aNew DelhibMcGraw Hill Education (India) Pvt. Ltd. New Delhic2018  avi, 404  c1120580d1120580