Coba jelasin UN 3291 (Limbah medis) dari Bahaya hayati dong

Baldwin, C. L., & Runkle, R.S. (1967). Biohazards symbol: development of a biological hazards warning signal. Science, 158, 264–265. Pubmed unique identifier 6053882.

Preston, Richard. (1994). The Hot Zone. Anchor Books: Division of Random House; New York.

Preston, Richard. (2002). The Demon in the Freezer: A True Story. Anchor Books: Division of Random House; New York.