APA
(1989). Proceeding of the national academy of sciences. U. S. A: National Academy Of Science.
Chicago
1989. Proceeding of the national academy of sciences. U. S. A: National Academy Of Science.
Harvard
(1989). Proceeding of the national academy of sciences. U. S. A: National Academy Of Science.
MLA
Proceeding of the national academy of sciences. U. S. A: National Academy Of Science. 1989.