Abdul Razak, M. R., A. Harun, S. N. Hussin, and R. Anwar. “The First Series of Malaysian Banknotes As a Symbol of a Nation’s Independence”. Environment-Behaviour Proceedings Journal, vol. 7, no. SI7, Aug. 2022, pp. 313-9, doi:10.21834/ebpj.v7iSI7.3797.