Gaya APA
Rata-rata upah pekerja perkebunan 1984-1986 = Average wage of estate workers 1984-1986 . (1987).
Jakarta:
[s.n.].
Gaya MLA
Rata-rata upah pekerja perkebunan 1984-1986 = Average wage of estate workers 1984-1986 .
.
Jakarta:
[s.n.],
1987.
Buku.