Craf, J. R. (1949). An introduction to business principles and practices. Harper.
Citazione stile Chigago Style (17a edizione)Craf, John Riley. An Introduction to Business Principles and Practices. New York: Harper, 1949.
Citatione MLA (9a ed.)Craf, John Riley. An Introduction to Business Principles and Practices. Harper, 1949.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.