Bolling, C. L. (1930). Retail Salesmanship: A Practical Guide to Modern Methods of Sales Persuasion Demonstration and service (2nd ed.). Isaac Pitman.
Chicago-tyylinen lähdeviittausBolling, Cunliffe L. Retail Salesmanship: A Practical Guide to Modern Methods of Sales Persuasion Demonstration and Service. 2nd ed. London: Isaac Pitman, 1930.
MLA-viiteBolling, Cunliffe L. Retail Salesmanship: A Practical Guide to Modern Methods of Sales Persuasion Demonstration and Service. 2nd ed. Isaac Pitman, 1930.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.