APA (7e ed.) Bronvermelding

Newbold, P. (1991). Statistics for business and economics (3rd ed.). Prentice-Hall.

Chicago (17e ed.) Bronvermelding

Newbold, Paul. Statistics for Business and Economics. 3rd ed. Englewood Cliffs, N.J: Prentice-Hall, 1991.

MLA (9e ed.) Bronvermelding

Newbold, Paul. Statistics for Business and Economics. 3rd ed. Prentice-Hall, 1991.