APA
Proceedings of the National Academy Of Sciences of the United States of America. U.S.A: The National Cancer Institute.
Chicago
Proceedings of the National Academy Of Sciences of the United States of America. U.S.A: The National Cancer Institute.
Harvard
Proceedings of the National Academy Of Sciences of the United States of America. U.S.A: The National Cancer Institute.
MLA
U.S.A: The National Cancer Institute. .