Byerlee, D., & Alex, G. E. (1998). Strengthening national agricultural research systems: Policy issues and good practice. World Bank.
Lua i Stíl Chicago (17ú heag.)Byerlee, Derek, agus Gary E. Alex. Strengthening National Agricultural Research Systems: Policy Issues and Good Practice. Washington, DC: World Bank, 1998.
Lua MLA (8ú heag.)Byerlee, Derek, agus Gary E. Alex. Strengthening National Agricultural Research Systems: Policy Issues and Good Practice. World Bank, 1998.
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