Gittinger, J. P. (1972). Economic analysis of agricultural projects. Johns Hopkins University Press.
Lua i Stíl Chicago (17ú heag.)Gittinger, James Price. Economic Analysis of Agricultural Projects. Baltimore: Johns Hopkins University Press, 1972.
Lua MLA (9ú heag.)Gittinger, James Price. Economic Analysis of Agricultural Projects. Johns Hopkins University Press, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.