Hatta Sidi, Geok Chin Tan & Raja Affendi Raja Ali.  (2022).  Chapter 32 the covid-19 pandemic through the eyes of the faculty of medicine: what have we learned?.  - .  409-418. 

Geok Chin Tan, Teck Yee Khong.  (2019).  Cyclic endometrium and exogenous hormone effect.  - .  1-557.