Cita APA (7a ed.)

Frost, R., & Day Lewis, C. (1968). Selected poems (1st ed., 5th repr.). Penguin Books.

Cita Chicago Style (17a ed.)

Frost, Robert, y C. Day Lewis. Selected Poems. 1st ed., 5th repr. Harmondsworth: Penguin Books, 1968.

Cita MLA (9a ed.)

Frost, Robert, y C. Day Lewis. Selected Poems. 1st ed., 5th repr. Penguin Books, 1968.