Gaya APA
Helfert, E, A.
(1982).
Techiques of financial analysis
.
Homewood, Ill.:
RIcahrd D. Irwin.
Gaya MLA
Helfert, Erich, A..
"Techiques of financial analysis".
Homewood, Ill.:
RIcahrd D. Irwin,
1982.
Text.