Academy of sciences of the Estonian S.S.R. Institute of Zoology and Botany. (1970). Waterfowl in Estonia: A contribution to the 15th international ornithological congress, The Hague, August 1970. Valgus.
Цитирование в стиле Чикаго (17-е изд.)Academy of sciences of the Estonian S.S.R. Institute of Zoology and Botany. Waterfowl in Estonia: A Contribution to the 15th International Ornithological Congress, The Hague, August 1970. Tallinn: Valgus, 1970.
Цитирование MLA (8-е изд.)Academy of sciences of the Estonian S.S.R. Institute of Zoology and Botany. Waterfowl in Estonia: A Contribution to the 15th International Ornithological Congress, The Hague, August 1970. Valgus, 1970.
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