Book chapter
1. WS Chai, KS Koh, KH Cheah (2022) Chapter 11 – Hydroxylammonium nitrate-The next generation green propellant. In: KH Cheah (ed.) Space micropropulsion for nanosatellites: Progress, challenges and future. Elsevier, pp. 285-305.

2. KH Cheah, WS Chai, T Katsumi (2022) Chapter 4 – Liquid propellant microthrusters. In: KH Cheah (ed.) Space micropropulsion for nanosatellites: Progress, challenges and future. Elsevier, pp. 85-122.

3. WY Cheah, TNBT Ibrahim, NSM Aron, WS Chai, PL Show (2022) Understanding environmental biotechnology 4.0. In: PL Show, WS Chai, TC Ling (ed.) Microalgae for Environmental Biotechnology. CRC Press, pp. 175-204.

4. K Gada, AP Peter, WS Chai, PL Show (2022) Industry perspectives of microalgae 4.0. In: PL Show, WS Chai, TC Ling (ed.) Microalgae for Environmental Biotechnology. CRC Press, pp. 363-395.

Book edited
1. PL Show, WS Chai, TC Ling (Eds.) (2022) Microalgae for Environmental Biotechnology: Smart Manufacturing and Industry 4.0 Applications (1st ed.). CRC Press.