Forbes, Bruce David. "Frontmatter". Christmas: A Candid History, Berkeley: University of California Press, 2007, pp. i-iv. https://doi.org/10.1525/9780520933729-fm
Forbes, Bruce David. "Frontmatter" In Christmas: A Candid History, i-iv. Berkeley: University of California Press, 2007. https://doi.org/10.1525/9780520933729-fm