Gaya APA

Swanson, C, P., (AAVIM), I, A, C, L, I, T, A, A, Ã, F, V, I, M. (1980). Planning for an irrigation system . Georgia: Georgia: AAVIM; 1980.

Gaya MLA

Swanson, Carl, P.., (AAVIM), I., Anderson,, Carl, L., II., The, American, Association, ì, For, Vocational, Instructional, Materials. "Planning for an irrigation system". Georgia: Georgia: AAVIM; 1980, 1980. Text.