APA (7th ed.) Citation

Sidney, P., Needham, H. A., & Shelley, P. B. An apology for poetry. Ginn.

Chicago Style (17th ed.) Citation

Sidney, Philip, H. A. Needham, and Percy Bysshe Shelley. An Apology for Poetry. London: Ginn.

MLA (8th ed.) Citation

Sidney, Philip, et al. An Apology for Poetry. Ginn.

Warning: These citations may not always be 100% accurate.