Não informado. (2018). Research Circular. Pennsylvania Department of Forests and Waters.
Style de citation Chicago (17e éd.)Não informado. Research Circular. Harrisburg, Pa: Pennsylvania Department of Forests and Waters, 2018.
Style de citation MLA (8e éd.)Não informado. Research Circular. Pennsylvania Department of Forests and Waters, 2018.
Attention : ces citations peuvent ne pas être correctes à 100%.