Hardip Singh Gendeh, Lum Sai Guan, Rohaizam Jaafar, Mawaddah Azman.  (2022).  Bab10: Tracheostomy and other operation procedures: the otolaryngology experience amidst the covid-19 pandemic.  - .  131-144. 

Hardip Singh Gendeh, Lum Sai Guan.  (2021).  Chapter 8: Acute management of nasal and ear infection.  - .  86-105. 

Hardip Singh Gendeh; Lum Sai Guan.  (2021).  chapter 8: Acute Management of nasal and ear infection.  - .  86-105.