APA
World Health Organization, . (1999). NIBSC - WHO international laboratory for biological standards 1999: biological reference materials. UK: National Institute for Biological Standards and Control.
Chicago
World Health Organization, . 1999. NIBSC - WHO international laboratory for biological standards 1999: biological reference materials. UK: National Institute for Biological Standards and Control.
Harvard
World Health Organization, . (1999). NIBSC - WHO international laboratory for biological standards 1999: biological reference materials. UK: National Institute for Biological Standards and Control.
MLA
World Health Organization, . NIBSC - WHO international laboratory for biological standards 1999: biological reference materials. UK: National Institute for Biological Standards and Control. 1999.