Zweers, G. A., Gerritsen, A. F. C., & Kranenburg-Voogd, P. J. v. (1977). Mechanics of feeding of the mallard (Anas platyrhynchos L.; Aves, Anseriformes): The lingual appartus and the suction-pressure pump mechanism of straining. S. Karger.
Chicago Style (17th ed.) CitationZweers, G. A., Anton F. C. Gerritsen, and Paula J. van Kranenburg-Voogd. Mechanics of Feeding of the Mallard (Anas Platyrhynchos L.; Aves, Anseriformes): The Lingual Appartus and the Suction-pressure Pump Mechanism of Straining. Basel ; New York: S. Karger, 1977.
MLA (9th ed.) CitationZweers, G. A., et al. Mechanics of Feeding of the Mallard (Anas Platyrhynchos L.; Aves, Anseriformes): The Lingual Appartus and the Suction-pressure Pump Mechanism of Straining. S. Karger, 1977.
Warning: These citations may not always be 100% accurate.