Cita APA (7th ed.)

Kahn, J., & Klein, J. J. 1. (1914). Principles and methods in commercial education ; a textbook for teachers, students and business men. The Macmillan company.

Cita Chicago (17th ed.)

Kahn, Joseph, i Joseph Jerome 1884 Klein. Principles and Methods in Commercial Education ; a Textbook for Teachers, Students and Business Men. New York: The Macmillan company, 1914.

Cita MLA (9th ed.)

Kahn, Joseph, i Joseph Jerome 1884 Klein. Principles and Methods in Commercial Education ; a Textbook for Teachers, Students and Business Men. The Macmillan company, 1914.