Cita APA (7th ed.)

Elzawawy, A., & Kerr, D. (2013). Variation in the availability of cancer drug generics in the United States of America.

Cita Chicago (17th ed.)

Elzawawy, A., i D. Kerr. Variation in the Availability of Cancer Drug Generics in the United States of America. 2013.

Cita MLA (9th ed.)

Elzawawy, A., i D. Kerr. Variation in the Availability of Cancer Drug Generics in the United States of America. 2013.