Lee, W.C., Mahmud, R., Noordin, R., Piaru, S.P., Perumal, S. and Ismail, S. 2012. Alkaloids content, cytotoxicity and anti-Toxoplasma gondii activity of Psidium guajava L. and Tinospora crispa. Bangladesh Journal of Pharmacology. 7, 4 (Nov. 2012), 272–276. DOI:https://doi.org/10.3329/bjp.v7i4.12499.