Bunce, Michael (2020) Internal Combustion Engines and Powertrain Systems for future Transport 2019. -, - (-). CRC Press, London. ISBN 978-1-003-02398-2

Gupta, Kirti and Pandey, Neeta and Gupta, Maneesha (2020) Model and Design of Improved Current Mode Logic Gates: Differential and Single-ended. Springer Singapore, Singapore. ISBN 978-981-15-0982-7

Nur Hasanah, Fitria and Sri Untari, Rahmania (2020) Rekayasa Perangkat Lunak. Penerbit UMSIDA Press. ISBN 978-623-6833-89-6

Probst, Oliver and Castellanos, Sergio and Palacios, Rodrigo (2020) Transforming the Grid Towards Fully Renewable Energy (Energy Engineering). ‎ The Institution of Engineering and Technology, London, UK.. ISBN 978-1-83953-022-7