Wasata Jati, P.T. (1980). Feasibility study/project proposal pengembangan Perkebunan "Lalow-Lolak". Wasata Jati.
Dyfyniad Arddull ChicagoWasata Jati, P.T. Feasibility Study/project Proposal Pengembangan Perkebunan "Lalow-Lolak". Manado: Wasata Jati, 1980.
Dyfyniad MLAWasata Jati, P.T. Feasibility Study/project Proposal Pengembangan Perkebunan "Lalow-Lolak". Wasata Jati, 1980.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.