American Brain Tumor Association. https://www.abta.org/about-brain-tumors/brain-tumor-diagnosis/brain-tumor-signs-symptoms/
Diakses pada 18 Juli 2019Cancer.net. https://www.cancer.net/cancer-types/brain-tumor
Diakses pada 18 Juli 2019Emedicine Health. https://www.emedicinehealth.com/brain_cancer/article_em.htm
Diakses pada 18 Juli 2019
https://www.mayoclinic.org/diseases-conditions/brain-tumor/symptoms-causes/syc-20350084