Tài liệu tham khảo WikiPedia: Toyohira, Sapporo https://tools.wmflabs.org/geohack/geohack.php?lang... https://tools.wmflabs.org/geohack/geohack.php?lang... https://www.citypopulation.de/en/japan/sapporo/011... http://www.city.sapporo.jp/toyohira https://commons.wikimedia.org/wiki/Category:Toyohi... https://www.wikidata.org/wiki/Q1134225#identifiers https://musicbrainz.org/area/6cdbfe4d-eb25-441f-b9... https://id.ndl.go.jp/auth/ndlna/00635154 https://viaf.org/viaf/257267544 https://www.worldcat.org/identities/viaf-257267544
