Function write_archive_citation 

pub fn write_archive_citation(
    list: &[Data],
    to: &str,
    base_name: &str,
    batch_size: usize,
    style: Option<&str>,
    locale: Option<&str>,
) -> Result<Vec<(String, Vec<u8>)>>

Like write_archive, but passes CSL style/locale through to the citation writer when to == "citation".