APA (7e ed.) Bronvermelding

Não informado. (2018). Proceedings of the Portland Society of Natural History. Portland Society of Natural History.

Chicago (17e ed.) Bronvermelding

Não informado. Proceedings of the Portland Society of Natural History. Portland, Me: Portland Society of Natural History, 2018.

MLA (8e ed.) Bronvermelding

Não informado. Proceedings of the Portland Society of Natural History. Portland Society of Natural History, 2018.

Let op: Deze citaties zijn niet altijd 100% accuraat.