APA
Consultative Group on International Agricultural Research (CGIAR), . (1989). Letters from the Chairman of the CGIAR to the heads of CGIAR delegations; 13 Feb. and 10 Abr. 1989. Washington, DC (USA): .
Chicago
Consultative Group on International Agricultural Research (CGIAR), . 1989. Letters from the Chairman of the CGIAR to the heads of CGIAR delegations; 13 Feb. and 10 Abr. 1989. Washington, DC (USA): .
Harvard
Consultative Group on International Agricultural Research (CGIAR), . (1989). Letters from the Chairman of the CGIAR to the heads of CGIAR delegations; 13 Feb. and 10 Abr. 1989. Washington, DC (USA): .
MLA
Consultative Group on International Agricultural Research (CGIAR), . Letters from the Chairman of the CGIAR to the heads of CGIAR delegations; 13 Feb. and 10 Abr. 1989. Washington, DC (USA): . 1989.