Citazione Stile APA (7a Edizione)

Freund, J. E., & Williams, F. J. (1982). Elementary business statistics: The modern approach (4th ed.). Prentice-Hall.

Citazione stile Chigago Style (17a edizione)

Freund, John E., e Frank Jefferson Williams. Elementary Business Statistics: The Modern Approach. 4th ed. Englewood Cliffs, N.J.: Prentice-Hall, 1982.

Citatione MLA (9a ed.)

Freund, John E., e Frank Jefferson Williams. Elementary Business Statistics: The Modern Approach. 4th ed. Prentice-Hall, 1982.