Παραπομπή APA

Freund, J. E. (1976). Statistics: A first course (2.). Prin tice hall.

Παραπομπή Chicago Style

Freund, J E. Statistics: A First Course. 2. New jerssey: Prin tice hall, 1976.

Παραπομπή MLA

Freund, J E. Statistics: A First Course. 2. Prin tice hall, 1976.