APA-referens (7:e uppl.)

HELFERT ERICH A. (1977). TECHNIQUES OF FINANCIAL ANALYSIS (4TH.). RICHARD D.IRWIN INC.

Chicago-referens (17:e uppl.)

HELFERT ERICH A. TECHNIQUES OF FINANCIAL ANALYSIS. 4TH. ONTARIO: RICHARD D.IRWIN INC, 1977.

MLA-referens (9:e uppl.)

HELFERT ERICH A. TECHNIQUES OF FINANCIAL ANALYSIS. 4TH. RICHARD D.IRWIN INC, 1977.