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Gaya APA

Suwartojo, D, B. (1982). Modal Kerja (Memulai Usaha Memperluas Usaha) . Indonesia: Lembaga PPM dan Balai Aksara.

Gaya MLA

Suwartojo, Drs., B. "Modal Kerja (Memulai Usaha Memperluas Usaha)". Indonesia: Lembaga PPM dan Balai Aksara, 1982. Text.