Παραπομπή σε μορφή APA (7η εκδ.)

Não informado. (1960). Technical communication. Department of Agriculture and Water Supply.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Não informado. Technical Communication. Pretoria, Africa do Sul: Department of Agriculture and Water Supply, 1960.

Παραπομπή σε μορφή MLA (8th εκδ.)

Não informado. Technical Communication. Department of Agriculture and Water Supply, 1960.

Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.