APA
FERRIS R., . (2011). Fertility awareness-based methods for family planning as an alternative to hormonal contraceptives for therapeutic reasons. : Catholic Medical Association.
Chicago
FERRIS Ronald, . 2011. Fertility awareness-based methods for family planning as an alternative to hormonal contraceptives for therapeutic reasons. : Catholic Medical Association.
Harvard
FERRIS R., . (2011). Fertility awareness-based methods for family planning as an alternative to hormonal contraceptives for therapeutic reasons. : Catholic Medical Association.
MLA
FERRIS Ronald, . Fertility awareness-based methods for family planning as an alternative to hormonal contraceptives for therapeutic reasons. : Catholic Medical Association. 2011.