Gaya APA
Clifton, D, S., Fyffe, D, E. (1977).
PROJECT FEASIBILITY ANALYSIS : A GUIDE TO PROFITABLE NEW VENTURES .
Amerika:
A Wiey Interscence.
Gaya MLA
Clifton, David, S.., Fyffe, David, E..
"PROJECT FEASIBILITY ANALYSIS : A GUIDE TO PROFITABLE NEW VENTURES".
Amerika:
A Wiey Interscence,
1977.
Text.