APA-referens (7:e uppl.)

Freund, J. E. (1967). Modern elementary statistics (3d ed.). Prentice-Hall.

Chicago-referens (17:e uppl.)

Freund, John E. Modern Elementary Statistics. 3d ed. Englewood Cliffs, N.J.: Prentice-Hall, 1967.

MLA-referens (8:e uppl.)

Freund, John E. Modern Elementary Statistics. 3d ed. Prentice-Hall, 1967.