Não informado. (2008). Transactions of the Sapporo Natural History Society. Sapporo Natural History Society.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Transactions of the Sapporo Natural History Society. Sapporo, Japão: Sapporo Natural History Society, 2008.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Transactions of the Sapporo Natural History Society. Sapporo Natural History Society, 2008.
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