Hughes, H., K., Kahl, L., K.(2018).The Johns Hopkins Hospital: The Harriet Lane Handbook (twenty-first edition) International Edition (twenty-first).United States of America:Elsevier.
Gaya MLA
Hughes, H., K., Kahl, L., K..The Johns Hopkins Hospital: The Harriet Lane Handbook (twenty-first edition) International Edition.twenty-firstUnited States of America:Elsevier,2018.Textbook.