APA
(1998). Cardiovascular disease and steroid hormone contraception. World health organization, Geneva: .
Chicago
1998. Cardiovascular disease and steroid hormone contraception. World health organization, Geneva: .
Harvard
(1998). Cardiovascular disease and steroid hormone contraception. World health organization, Geneva: .
MLA
Cardiovascular disease and steroid hormone contraception. World health organization, Geneva: . 1998.