Successful Selling, V10-12: What, Who, Why, How

The Art of Selling: For Business Colleges, High Schools of Commerce, Y. M. C. A. Classes, and Private Students (1911)

Successful Selling, V6-9: What, Who, Why, How

Successful Selling, V1-5: What, Who, Why, How

The Science of Business; Volume 2

The Science of Business: Being the Philosophy of Successful Human Activity Functioning in Business Building or Constructive Salesmanship, Book 4

The Art of Selling: For Business Colleges, High Schools of Commerce, Y. M. C. A. Classes, and Private Students (1911)

Successful Selling, V1-5: What, Who, Why, How

The Science of Business, Lesson 7: Being the Philosophy of Successful Human Activity Functioning in Business Building or Constructive Salesmanship (1917)

A Manual Devoted to the Principle of Service and the Law of Conservation