APA

Johnson D. M., Doern G. V., Haugen T. A., Hindler J., Washington J. A. & Jones R. N. (19970221). Comparative activity of twelve beta-lactam drugs tested against penicillin-resistant Streptococcus pneumoniae from five medical centers: effects of serum protein and capsular material on potency and spectrum as measured by reference tests. : Diagnostic microbiology and infectious disease.

Chicago

Johnson D M, Doern G V, Haugen T A, Hindler J, Washington J A and Jones R N. 19970221. Comparative activity of twelve beta-lactam drugs tested against penicillin-resistant Streptococcus pneumoniae from five medical centers: effects of serum protein and capsular material on potency and spectrum as measured by reference tests. : Diagnostic microbiology and infectious disease.

Harvard

Johnson D. M., Doern G. V., Haugen T. A., Hindler J., Washington J. A. and Jones R. N. (19970221). Comparative activity of twelve beta-lactam drugs tested against penicillin-resistant Streptococcus pneumoniae from five medical centers: effects of serum protein and capsular material on potency and spectrum as measured by reference tests. : Diagnostic microbiology and infectious disease.

MLA

Johnson D M, Doern G V, Haugen T A, Hindler J, Washington J A and Jones R N. Comparative activity of twelve beta-lactam drugs tested against penicillin-resistant Streptococcus pneumoniae from five medical centers: effects of serum protein and capsular material on potency and spectrum as measured by reference tests. : Diagnostic microbiology and infectious disease. 19970221.