APA
WHO, . (1991). THE INTERNATIONAL PHARMOCOPOEIA:QUALITY SPECIFICATION (VOL-II). NEW DELHI: CBS.
Chicago
WHO, . 1991. THE INTERNATIONAL PHARMOCOPOEIA:QUALITY SPECIFICATION (VOL-II). NEW DELHI: CBS.
Harvard
WHO, . (1991). THE INTERNATIONAL PHARMOCOPOEIA:QUALITY SPECIFICATION (VOL-II). NEW DELHI: CBS.
MLA
WHO, . THE INTERNATIONAL PHARMOCOPOEIA:QUALITY SPECIFICATION (VOL-II). NEW DELHI: CBS. 1991.