Não informado. (2018). Proceedings of the Portland Society of Natural History. Portland Society of Natural History.
Chicago-Zitierstil (17. Ausg.)Não informado. Proceedings of the Portland Society of Natural History. Portland, Me: Portland Society of Natural History, 2018.
MLA-Zitierstil (8. Ausg.)Não informado. Proceedings of the Portland Society of Natural History. Portland Society of Natural History, 2018.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.