UGM, I. G. (1981). Pemindahan tanah mekanis.
Chicago Style (17th ed.) CitationUGM, ISMAR GROUP. Pemindahan Tanah Mekanis. 1981.
MLA (8th ed.) CitationUGM, ISMAR GROUP. Pemindahan Tanah Mekanis. 1981.
Warning: These citations may not always be 100% accurate.