APA-referens (7:e uppl.)

Helfert, E. A. (1972). Techniques of financial analysis (3rd ed.). R. D. Irwin.

Chicago-referens (17:e uppl.)

Helfert, Erich A. Techniques of Financial Analysis. 3rd ed. Homewood, Ill.,: R. D. Irwin, 1972.

MLA-referens (8:e uppl.)

Helfert, Erich A. Techniques of Financial Analysis. 3rd ed. R. D. Irwin, 1972.