Gaya APA

Patty, E. (1964). On The Additional Survey For The Cement Raw Materials In The Tandjung Naman - Salangpungkur Arfa, Borohok District, North Sumatra . Bandung: Pusat Sumber Daya Geologi.

Gaya MLA

Patty, E.J.. "On The Additional Survey For The Cement Raw Materials In The Tandjung Naman - Salangpungkur Arfa, Borohok District, North Sumatra". Bandung: Pusat Sumber Daya Geologi, 1964. Bukan Logam.