Mayo Clinic: https://www.mayoclinic.org/diseases-conditions/basal-cell-carcinoma/diagnosis-treatment/drc-20354193
Diakses pada 17 Juni 2019Skin cancer Foundation: https://www.skincancer.org/skin-cancer-information/basal-cell-carcinoma/the-five-warning-signs-images
Diakses pada 17 Juni 2019Cancer Treatment centers of America: https://www.cancercenter.com/carcinoma
Diakses pada 17 Juni 2019Skin Cancer Foundation: https://www.skincancer.org/skin-cancer-information/ask-the-experts/can-i-leave-my-cancer-alone
Diakses pada 17 Juni 2019