APA (7th ed.) Citation

Petrarca, F., Griffith, T. G., & Hainsworth, P. (1971). Selected poems. Manchester University Press.

Chicago Style (17th ed.) Citation

Petrarca, Francesco, T. Gwynfor Griffith, and Peter Hainsworth. Selected Poems. Manchester: Manchester University Press, 1971.

MLA (9th ed.) Citation

Petrarca, Francesco, et al. Selected Poems. Manchester University Press, 1971.