@staticmethod
def get_citations(obj):
    """Get a list of citations from an object."""
    citations = 'None'
    for attr in ('cite_as', '_cite_as'):
        try:
            citations = getattr(obj, attr)
        except AttributeError:
            pass
        else:
            break
    if isinstance(citations, str):
        citations = [citations]
    return citations
