APA (7th ed.) Citation

Gray, T., & Walpole, H. (1867). Poems and letters.

Chicago Style (17th ed.) Citation

Gray, Thomas, and Horace Walpole. Poems and Letters. 1867.

MLA (9th ed.) Citation

Gray, Thomas, and Horace Walpole. Poems and Letters. 1867.

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