Lua APA (7ú heag.)

Kooloos, J. G. M. (1986). Integration of feeding mechanisms in some Anseriform birds. s.n..

Lua i Stíl Chicago (17ú heag.)

Kooloos, Johannes Gijsberthus Maria. Integration of Feeding Mechanisms in Some Anseriform Birds. [Leiden?, Netherlands: s.n., 1986.

Lua MLA (8ú heag.)

Kooloos, Johannes Gijsberthus Maria. Integration of Feeding Mechanisms in Some Anseriform Birds. s.n., 1986.

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