Gaya APA

Hirokawa, O. (1979). Answer to Exercises In Introdution to Polarizing Microscopic Observation . Bandung: Direktorat Jendral Pertambangan Umum.

Gaya MLA

Hirokawa, Osamu. "Answer to Exercises In Introdution to Polarizing Microscopic Observation". Bandung: Direktorat Jendral Pertambangan Umum, 1979. Text.