Gaya APA
Purwana, D., Hidayat, N.
(2017).
Studi Kelayakan Bisnis
(
Ed.1, Cet.2,5)
.
Jakarta:
Rajawali Perss.
Gaya MLA
Purwana, Dedi., Hidayat, Nurdin.
"Studi Kelayakan Bisnis".
Ed.1, Cet.2,5
Jakarta:
Rajawali Perss,
2017.
Text books.