APA
World Health Organisation, . (2002). WHO monographs on selected medicinal plants Vol. 2. Delhi: AITBS Publishers.
Chicago
World Health Organisation, . 2002. WHO monographs on selected medicinal plants Vol. 2. Delhi: AITBS Publishers.
Harvard
World Health Organisation, . (2002). WHO monographs on selected medicinal plants Vol. 2. Delhi: AITBS Publishers.
MLA
World Health Organisation, . WHO monographs on selected medicinal plants Vol. 2. Delhi: AITBS Publishers. 2002.