Lua APA (7ú heag.)

Meijer, W. (1951). The genus Orthodontium. North-Holland Pub..

Lua i Stíl Chicago (17ú heag.)

Meijer, Willem. The Genus Orthodontium. Amsterdam: North-Holland Pub., 1951.

Lua MLA (8ú heag.)

Meijer, Willem. The Genus Orthodontium. North-Holland Pub., 1951.

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