Lockheed, Marlaine E.; Harris, Abigail M. (2005). "Beneath Education Production Functions: The Case of Primary Education in Jamaica". Peabody Journal of Education. 80: 6–28. doi:10.1207/S15327930pje8001_2. S2CID144873879.
fordham.edu
Kelly, Milnes. "Abigail Harris". Fordham.edu. Retrieved 26 May 2018.
Lockheed, Marlaine E.; Harris, Abigail M. (2005). "Beneath Education Production Functions: The Case of Primary Education in Jamaica". Peabody Journal of Education. 80: 6–28. doi:10.1207/S15327930pje8001_2. S2CID144873879.