Gaya APA
Soemantry, S. (1982).
Study of Indonesia`s economic cally active population .
Yogyakarta:
Gadjah Mada University Press.
Gaya MLA
Soemantry, Soeharsono.
"Study of Indonesia`s economic cally active population".
Yogyakarta:
Gadjah Mada University Press,
1982.
Text.