Cita APA (7a ed.)

Cowper, W., & Frazer, J. G. (1912). Letters of William Cowper. Macmillan.

Cita Chicago Style (17a ed.)

Cowper, William, y James George Frazer. Letters of William Cowper. London: Macmillan, 1912.

Cita MLA (8a ed.)

Cowper, William, y James George Frazer. Letters of William Cowper. Macmillan, 1912.