APA (7th ed.) Citation

Frost, R. (1965). Selected letters of Robert Frost (1. publ.). Cape.

Chicago Style (17th ed.) Citation

Frost, Robert. Selected Letters of Robert Frost. 1. publ. London: Cape, 1965.

MLA (9th ed.) Citation

Frost, Robert. Selected Letters of Robert Frost. 1. publ. Cape, 1965.

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