Citazione Stile APA (7a Edizione)

Spengler, E. H. 1., & Klein, J. 1. (1955). Introduction to business. McGraw-Hill.

Citazione stile Chigago Style (17a edizione)

Spengler, Edwin Harold 1906, e Jacob 1896 Klein. Introduction to Business. New York: McGraw-Hill, 1955.

Citatione MLA (9a ed.)

Spengler, Edwin Harold 1906, e Jacob 1896 Klein. Introduction to Business. McGraw-Hill, 1955.