Gardner, H. (1972). The metaphysical poets. Penguin.
Lua i Stíl Chicago (17ú heag.)Gardner, Helen. The Metaphysical Poets. New York: Penguin, 1972.
Lua MLA (9ú heag.)Gardner, Helen. The Metaphysical Poets. Penguin, 1972.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.