Mehra, Partap Sing. et. al. Pengantar Logika Tradisional. - Bandung: Binacipta, 1980. - ix, 81p. ilus, 20 cm. Subjects--Topical Terms: Logika--PengantarProposisi LC Class. No.: BC108 / .M457 1980 Dewey Class. No.: 160