Não informado. (1974). Key-word-index of Wildlife Research. Swiss Wildlife Information Service.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Key-word-index of Wildlife Research. Zurich, Suíça: Swiss Wildlife Information Service, 1974.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Key-word-index of Wildlife Research. Swiss Wildlife Information Service, 1974.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.