Gittinger, J. P. (1966). The literature of agricultural planning. National Planning Association.
Lua i Stíl Chicago (17ú heag.)Gittinger, James Price. The Literature of Agricultural Planning. [Washington]: National Planning Association, 1966.
Lua MLA (9ú heag.)Gittinger, James Price. The Literature of Agricultural Planning. National Planning Association, 1966.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.