Gaya APA

Dr.Ir.S.H.Tan, . (1969). Report On A Survey In The Quartz-Sandstone Area In The Surroundings Of Sermo (Sheet 72, Purworedjo) In July-August 1940 . Bandung: Pusat Sumber Daya Geologi.

Gaya MLA

Dr.Ir.S.H.Tan, . "Report On A Survey In The Quartz-Sandstone Area In The Surroundings Of Sermo (Sheet 72, Purworedjo) In July-August 1940". Bandung: Pusat Sumber Daya Geologi, 1969. Bukan Logam.