Não informado. (1968). Canadian agricultural insect pest review. Department of Agriculture, Information Division.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Canadian Agricultural Insect Pest Review. Ottawa: Department of Agriculture, Information Division, 1968.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Canadian Agricultural Insect Pest Review. Department of Agriculture, Information Division, 1968.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.