Gaya APA

Fyffe, D, S, C, D, E. (1977). Project feasibility analysis : a guide to profitable new ventures . : Jhon Wiley & Sons.

Gaya MLA

Fyffe, David, S., Clifton,, David, E.. "Project feasibility analysis : a guide to profitable new ventures". : Jhon Wiley & Sons, 1977. Text.