Gaya APA

Unger, E, H, &, H. (). The good & the bad : operational & maintenance (O&M) infrastructure . Jakarta: PNPM Support Facilities (PSF).

Gaya MLA

Unger, Ekart, Hartmann, &, Heinz. "The good & the bad : operational & maintenance (O&M) infrastructure". Jakarta: PNPM Support Facilities (PSF), . Text.