Lee; Seda. Search Engine Advertising: Buying Your Way to the Top to Increase Sales (2.). Pearson India.
Chicago-viite (17. p.)Lee; Seda. Search Engine Advertising: Buying Your Way to the Top to Increase Sales. 2. Pearson India.
MLA-viite (8. p.)Lee; Seda. Search Engine Advertising: Buying Your Way to the Top to Increase Sales. 2. Pearson India.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.