APA-viite (7. p.)

Helfert, E. A. (1997). Techniques of financial analysis: A modern approach (9th ed.). Irwin.

Chicago-viite (17. p.)

Helfert, Erich A. Techniques of Financial Analysis: A Modern Approach. 9th ed. Chicago: Irwin, 1997.

MLA-viite (9. p.)

Helfert, Erich A. Techniques of Financial Analysis: A Modern Approach. 9th ed. Irwin, 1997.