Παραπομπή APA

Freund, J. E., & Williams, J. F. P. (1970). Modern Business Statistics (2nd ed.). Pitman.

Παραπομπή Chicago Style

Freund, John E., και J. Frank Perles Williams. Modern Business Statistics. 2nd ed. London: Pitman, 1970.

Παραπομπή MLA

Freund, John E., και J. Frank Perles Williams. Modern Business Statistics. 2nd ed. Pitman, 1970.