Não informado. (1968). Canadian agricultural insect pest review. Department of Agriculture, Information Division.
Chicago-viite (17. p.)Não informado. Canadian Agricultural Insect Pest Review. Ottawa: Department of Agriculture, Information Division, 1968.
MLA-viite (8. p.)Não informado. Canadian Agricultural Insect Pest Review. Department of Agriculture, Information Division, 1968.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.