Não informado. (1972). Journal of the South African Veterinary Association. South African Veterinary Association.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Journal of the South African Veterinary Association. Pretoria, Africa do Sul: South African Veterinary Association, 1972.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Journal of the South African Veterinary Association. South African Veterinary Association, 1972.
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