Pettersson, B. (1984). Ecology of an isolated population of the middle spotted woodpecker, Dendrocopos medius (L.), in the extinction phase =: En isolerad mellanspettpopulations ekologi under utdöendefasen. Swedish University of Agricultural Sciences, Dept. of Wildlife Ecology.
Citace podle Chicago (17th ed.)Pettersson, Börje. Ecology of an Isolated Population of the Middle Spotted Woodpecker, Dendrocopos Medius (L.), in the Extinction Phase =: En Isolerad Mellanspettpopulations Ekologi Under Utdöendefasen. Uppsala: Swedish University of Agricultural Sciences, Dept. of Wildlife Ecology, 1984.
Citace podle MLA (8th ed.)Pettersson, Börje. Ecology of an Isolated Population of the Middle Spotted Woodpecker, Dendrocopos Medius (L.), in the Extinction Phase =: En Isolerad Mellanspettpopulations Ekologi Under Utdöendefasen. Swedish University of Agricultural Sciences, Dept. of Wildlife Ecology, 1984.