Gaya APA
Nasution, D, I, R, H, A.
(2017).
Statistik Ekonomi
.
Medan:
Perdana Publishing.
Gaya MLA
Nasution, Dani, Iskandar,, Roswita, Hafni,, Amhar.
"Statistik Ekonomi".
Medan:
Perdana Publishing,
2017.
Text.