Lua APA (7ú heag.)

Freijsen, A. H. J. (1967). A field study on the ecology of centaurium vulgare rafn. H. Gianotten.

Lua i Stíl Chicago (17ú heag.)

Freijsen, Arnoldus Henricus Joseph. A Field Study on the Ecology of Centaurium Vulgare Rafn. Tilburg: H. Gianotten, 1967.

Lua MLA (8ú heag.)

Freijsen, Arnoldus Henricus Joseph. A Field Study on the Ecology of Centaurium Vulgare Rafn. H. Gianotten, 1967.

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