Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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