Citazione Stile APA (7a Edizione)

Frost, R. (1964). Selected letters of Rober Frest. Holt , Rinehart and Winston.

Citazione stile Chigago Style (17a edizione)

Frost, Robert. Selected Letters of Rober Frest. New York: Holt , Rinehart and Winston, 1964.

Citatione MLA (9a ed.)

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