Martin Luther King Jr. Research and Education Institute. [2013-12-29]. (原始内容存档于2015-03-15). (英文)Stanford Facts: Research - Stanford Libraries. [2014-01-23]
problem and the development solution’Stanford, Calif.: Food ResearchInstitute, Stanford University, (Food ResearchInstitute studies; v. 16, no. 1). Yotopoulos
and Universities, NBER Working Paper No. W10803. National Bureau of EconomicResearch. 2005 [2015-10-18]. (原始内容存档于2015-10-17). NRC Rankings. [10/09/2008]