Halawa, E., E. Sitanggang, and M. Munawarah. “Dampak Firm Size, Return on Equity, Debt to Assets Ratio Terhadap Income Smoothing Oleh Perusahaan Manufaktur”. Journal of Business and Economics Research (JBE), Vol. 1, no. 3, Oct. 2020, pp. 258-65, doi:10.47065/jbe.v1i3.490.