Παραπομπή σε μορφή APA (7η εκδ.)

Freund, J. E., & Williams, F. J. (1982). Elementary business statistics: The modern approach (4th ed.). Prentice-Hall International.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Freund, John E., και Frank Jefferson Williams. Elementary Business Statistics: The Modern Approach. 4th ed. London: Prentice-Hall International, 1982.

Παραπομπή σε μορφή MLA (9th εκδ.)

Freund, John E., και Frank Jefferson Williams. Elementary Business Statistics: The Modern Approach. 4th ed. Prentice-Hall International, 1982.