APA-viite

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

Chicago-tyylinen lähdeviittaus

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

MLA-viite

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