APA
Who, . (1998). Basic tests for drugs pharmaceutical substances medicinal plant materials and dosage forms. Geneva: WHO Regional Publications.
Chicago
Who, . 1998. Basic tests for drugs pharmaceutical substances medicinal plant materials and dosage forms. Geneva: WHO Regional Publications.
Harvard
Who, . (1998). Basic tests for drugs pharmaceutical substances medicinal plant materials and dosage forms. Geneva: WHO Regional Publications.
MLA
Who, . Basic tests for drugs pharmaceutical substances medicinal plant materials and dosage forms. Geneva: WHO Regional Publications. 1998.