Tietueen sitaatit
APA-viiteUlfvens, J. (1988). Comparative breeding ecology of the Horned Grebe Podiceps auritus and the Great Crested Grebe Podiceps cristatus: Archipelago versus lake habitats. Finnish Zoological Publishing Board : Akateeminen kirjakauppa, distr.
Chicago-tyylinen lähdeviittausUlfvens, Johan. Comparative Breeding Ecology of the Horned Grebe Podiceps Auritus and the Great Crested Grebe Podiceps Cristatus: Archipelago Versus Lake Habitats. Hki: Finnish Zoological Publishing Board : Akateeminen kirjakauppa, distr, 1988.
MLA-viiteUlfvens, Johan. Comparative Breeding Ecology of the Horned Grebe Podiceps Auritus and the Great Crested Grebe Podiceps Cristatus: Archipelago Versus Lake Habitats. Finnish Zoological Publishing Board : Akateeminen kirjakauppa, distr, 1988.
Harvard-tyylinen lähdeviittausUlfvens, J. 1988. Comparative breeding ecology of the Horned Grebe Podiceps auritus and the Great Crested Grebe Podiceps cristatus: Archipelago versus lake habitats. Hki: Finnish Zoological Publishing Board : Akateeminen kirjakauppa, distr.