Gupta, S. (2018). Digital Marketing. McGraw Hill Education (India) Private Limited.
芝加哥风格引文Gupta, Seema. Digital Marketing. Chennai: McGraw Hill Education (India) Private Limited, 2018.
MLA引文Gupta, Seema. Digital Marketing. McGraw Hill Education (India) Private Limited, 2018.
警告：这些引文格式不一定是100％准确.