Hafez, E., & Van Os W.A. A., e. (1980). Biodegradables and delivery systems for Contraception. G. K. Hall Medical.
Cita Chicago (17th ed.)Hafez, E.S.E, i ed Van Os W.A. A. Biodegradables and Delivery Systems for Contraception. G. K. Hall Medical, 1980.
Cita MLA (9th ed.)Hafez, E.S.E, i ed Van Os W.A. A. Biodegradables and Delivery Systems for Contraception. G. K. Hall Medical, 1980.
Atenció: Aquestes cites poden no estar 100% correctes.