Evans, J. F., & Salcedo, R. N. j. a. (1974). Communications in agriculture: The American farm press. Iowa State University Press.
Lua i Stíl Chicago (17ú heag.)Evans, James F., agus Rodolfo N. joint auth Salcedo. Communications in Agriculture: The American Farm Press. Ames: Iowa State University Press, 1974.
Lua MLA (9ú heag.)Evans, James F., agus Rodolfo N. joint auth Salcedo. Communications in Agriculture: The American Farm Press. Iowa State University Press, 1974.
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