DJOJOHADIKUSUMA, S., & DJOJOHADIKUSUMA, S. (1974). Energy And Raw Materials Present And Future Sumitro Djojohadikusuma. t.p.
Lua i Stíl Chicago (17ú heag.)DJOJOHADIKUSUMA, Sumitro, agus Sumitro DJOJOHADIKUSUMA. Energy And Raw Materials Present And Future Sumitro Djojohadikusuma. t.p, 1974.
Lua MLA (8ú heag.)DJOJOHADIKUSUMA, Sumitro, agus Sumitro DJOJOHADIKUSUMA. Energy And Raw Materials Present And Future Sumitro Djojohadikusuma. t.p, 1974.
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