APA-viite (7. p.)

Helfert, E. A. (1967). Techniques of financial analysis (Rev. ed.). R.D. Irwin.

Chicago-viite (17. p.)

Helfert, Erich A. Techniques of Financial Analysis. Rev. ed. Homewood, Ill.: R.D. Irwin, 1967.

MLA-viite (8. p.)

Helfert, Erich A. Techniques of Financial Analysis. Rev. ed. R.D. Irwin, 1967.