Citazione Stile APA (7a Edizione)

Helfert, E. (1987). Techniques of financial analysis (6th.). Universal Book Stall.

Citazione stile Chigago Style (17a edizione)

Helfert, Erich. Techniques of Financial Analysis. 6th. New Delhi: Universal Book Stall, 1987.

Citatione MLA (9a ed.)

Helfert, Erich. Techniques of Financial Analysis. 6th. Universal Book Stall, 1987.