APA (7th ed.) Zitazioa

FROST, R. (1964). Selected letters of Robert Frost. Holt, Rinehart and Winston.

Chicago Style (17th ed.) Zitazioa

FROST, Robert. Selected Letters of Robert Frost. New york: Holt, Rinehart and Winston, 1964.

MLA (9th ed.) Zitazioa

FROST, Robert. Selected Letters of Robert Frost. Holt, Rinehart and Winston, 1964.