APA (7e ed.) Bronvermelding

Freund, J. E. (1960). Modern elementary statistics (2d ed.). Prentice-Hall.

Chicago (17e ed.) Bronvermelding

Freund, John E. Modern Elementary Statistics. 2d ed. Englewood Cliffs, N.J.: Prentice-Hall, 1960.

MLA (9e ed.) Bronvermelding

Freund, John E. Modern Elementary Statistics. 2d ed. Prentice-Hall, 1960.