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Gaya APA
Diwiryo, R.(1990).Peningkatan Mutu Konstruksi Jalan dan Keselamata Lalu Lintas Menuju Optimasi Pembinaan Jaringan Jalan .Indonesia:-.
Gaya MLA
Diwiryo, Ruslan."Peningkatan Mutu Konstruksi Jalan dan Keselamata Lalu Lintas Menuju Optimasi Pembinaan Jaringan Jalan".Indonesia:-,1990.Text.