APA (7e ed.) Bronvermelding

Freund, J. E. (1984). Modern elementary statistics (6th ed.). Prentice-Hall.

Chicago (17e ed.) Bronvermelding

Freund, John E. Modern Elementary Statistics. 6th ed. Englewood Cliffs, N.J: Prentice-Hall, 1984.

MLA (9e ed.) Bronvermelding

Freund, John E. Modern Elementary Statistics. 6th ed. Prentice-Hall, 1984.