Não informado. (1960). Technical communication. Department of Agriculture and Water Supply.
Style de citation Chicago (17e éd.)Não informado. Technical Communication. Pretoria, Africa do Sul: Department of Agriculture and Water Supply, 1960.
Style de citation MLA (8e éd.)Não informado. Technical Communication. Department of Agriculture and Water Supply, 1960.
Attention : ces citations peuvent ne pas être correctes à 100%.