Lua APA (7ú heag.)

Heady, E. O., & Srivastava, U. K. (1975). Spatial sector programming models in agriculture. Iowa State university.

Lua i Stíl Chicago (17ú heag.)

Heady, Earl O., agus Uma K. Srivastava. Spatial Sector Programming Models in Agriculture. Ames: Iowa State university, 1975.

Lua MLA (9ú heag.)

Heady, Earl O., agus Uma K. Srivastava. Spatial Sector Programming Models in Agriculture. Iowa State university, 1975.

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