Gaya APA
Jakarta, B, P, S. (1991).
Statistik Indonesia 1990 = Statistical year book of Indonesia 1990 .
Jakarta:
[s.n.].
Gaya MLA
Jakarta, BIRO, Pusat, Statistik,.
"Statistik Indonesia 1990 = Statistical year book of Indonesia 1990".
Jakarta:
[s.n.],
1991.
Buku.