APA

Anderson J. R., Hazell P. B. R., .Variability in grain yields. s.l: Johns Hopkins University - International Food Policy Research Institute.

Chicago

Anderson Jock R, Hazell Peter B R, .Variability in grain yields. s.l: Johns Hopkins University - International Food Policy Research Institute.

Harvard

Anderson J. R., Hazell P. B. R., .Variability in grain yields. s.l: Johns Hopkins University - International Food Policy Research Institute.

MLA

Anderson Jock R, Hazell Peter B R, .s.l: Johns Hopkins University - International Food Policy Research Institute. .