Marx, Karl and Engels, Friedrich. "Frontmatter". The Communist Manifesto, edited by Jeffrey C. Isaac, New Haven: Yale University Press, 2012, pp. i-x. https://doi.org/10.12987/9780300163209-fm
Marx, K. & Engels, F. (2012). Frontmatter. In J. Isaac (Ed.), The Communist Manifesto (pp. i-x). New Haven: Yale University Press. https://doi.org/10.12987/9780300163209-fm
Marx, K. and Engels, F. 2012. Frontmatter. In: Isaac, J. ed. The Communist Manifesto. New Haven: Yale University Press, pp. i-x. https://doi.org/10.12987/9780300163209-fm
Marx, Karl and Engels, Friedrich. "Frontmatter" In The Communist Manifesto edited by Jeffrey C. Isaac, i-x. New Haven: Yale University Press, 2012. https://doi.org/10.12987/9780300163209-fm