Çankaya, S., Eker, S. and Abacı, S.H. 2019. Comparison of Least Squares, Ridge Regression and Principal Component Approaches in the Presence of Multicollinearity in Regression Analysis. Turkish Journal of Agriculture - Food Science and Technology. 7, 8 (Aug. 2019), 1166–1172. DOI:https://doi.org/10.24925/turjaf.v7i8.1166-1172.2515.