Villars, Pierre, Cenzual, Karin and Penzo, Marinella. "Frontmatter". BIbliography, Berlin, München, Boston: De Gruyter, 2014, pp. i-iv. https://doi.org/10.1515/9783110311761.fm
Villars, P., Cenzual, K. & Penzo, M. (2014). Frontmatter. In BIbliography (pp. i-iv). Berlin, München, Boston: De Gruyter. https://doi.org/10.1515/9783110311761.fm
Villars, Pierre, Cenzual, Karin and Penzo, Marinella. "Frontmatter" In BIbliography, i-iv. Berlin, München, Boston: De Gruyter, 2014. https://doi.org/10.1515/9783110311761.fm