APA Style
NCRP, . (1983).
Environmental Radioactivity: proceedings of the Nineteenth Annual Meeting. 6-7 April 1993 .
Bethesda:
NCRP.
MLA Style
NCRP, .
"Environmental Radioactivity: proceedings of the Nineteenth Annual Meeting. 6-7 April 1993".
Bethesda:
NCRP,
1983.
Buku.