Gaya APA
Joyohadikusumo, S. (1977).
Appropriate technology / Sumitro Djojohadikusumo .
:
Pacific Science Association.
Gaya MLA
Joyohadikusumo, Sumitro.
"Appropriate technology / Sumitro Djojohadikusumo".
:
Pacific Science Association,
1977.
Referensi.