After an initial version that returned dictionaries, version v0.2 returns named tuples. So, instead of
publication["cite"]["chicago-author-date"]
you now write
publication.cite.chicago_author_date
Notice that hyphens (-) from the original api are replaced with underscores (_).
Also, if in the original API a field begins with an underscore, this underscore is removed (e.g. `_id` becomes `id`).