APA (7th ed.) Citation

Gilkes, M. (1948). A key to modern English poetry (Repr.). Blackie.

Chicago Style (17th ed.) Citation

Gilkes, Martin. A Key to Modern English Poetry. Repr. London: Blackie, 1948.

MLA (9th ed.) Citation

Gilkes, Martin. A Key to Modern English Poetry. Repr. Blackie, 1948.

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