Gaya APA

Wahyudi, ., Sukma, D. (1991). Laporan regional physical planning, map improvement and training (Reppmit) di Propinsi Kalimantan Timur . Cibinong: Bakosurtanal.

Gaya MLA

Wahyudi, ., Sukma, Darul. "Laporan regional physical planning, map improvement and training (Reppmit) di Propinsi Kalimantan Timur". Cibinong: Bakosurtanal, 1991. Text.