Viksne, J., & Vilks, I. (1990). Baltic birds 5: Ecology, migration and protection of Baltic birds : proceedings of the fifth conference on the study and conservation of migratory birds of the Baltic basin, Riga, October 5-10, 1987. Riga: Zinatne.
Styl ChicagoViksne, Janis, and Ieva Vilks. Baltic Birds 5: Ecology, Migration and Protection of Baltic Birds : Proceedings of the Fifth Conference On the Study and Conservation of Migratory Birds of the Baltic Basin, Riga, October 5-10, 1987. Riga: Zinatne, 1990.
Citace podle MLAViksne, Janis, and Ieva Vilks. Baltic Birds 5: Ecology, Migration and Protection of Baltic Birds : Proceedings of the Fifth Conference On the Study and Conservation of Migratory Birds of the Baltic Basin, Riga, October 5-10, 1987. Riga: Zinatne, 1990.