Lua APA (7ú heag.)

(2006). Standard trade & industry directory of IndonesiaVol.1 and 2. Petrona Inti Chemindo.

Lua i Stíl Chicago (17ú heag.)

Standard Trade & Industry Directory of IndonesiaVol.1 and 2. Petrona Inti Chemindo, 2006.

Lua MLA (8ú heag.)

Standard Trade & Industry Directory of IndonesiaVol.1 and 2. Petrona Inti Chemindo, 2006.

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