APA
Alston J. M., Pardey P. G. & Norton G. W. (1995). Science under scarcity: Principles and practice for agricult. Ithaca: Cornell Uni Pr.
Chicago
Alston Julian M, Pardey Philip G and Norton George W. 1995. Science under scarcity: Principles and practice for agricult. Ithaca: Cornell Uni Pr.
Harvard
Alston J. M., Pardey P. G. and Norton G. W. (1995). Science under scarcity: Principles and practice for agricult. Ithaca: Cornell Uni Pr.
MLA
Alston Julian M, Pardey Philip G and Norton George W. Science under scarcity: Principles and practice for agricult. Ithaca: Cornell Uni Pr. 1995.