Citazione Stile APA (7a Edizione)

Gregory, D., & Ward, H. (1978). Statistics for business (3rd ed.). McGraw-Hill.

Citazione stile Chigago Style (17a edizione)

Gregory, Derek, e Harold Ward. Statistics for Business. 3rd ed. London: McGraw-Hill, 1978.

Citatione MLA (9a ed.)

Gregory, Derek, e Harold Ward. Statistics for Business. 3rd ed. McGraw-Hill, 1978.