APA (7th ed.) Citation

Frost, R., & Untermeyer, L. (1971). Robert Frost's poems: With an introduction and commentary. Pocket Books.

Chicago Style (17th ed.) Citation

Frost, Robert, and Louis Untermeyer. Robert Frost's Poems: With an Introduction and Commentary. New York: Pocket Books, 1971.

MLA (8th ed.) Citation

Frost, Robert, and Louis Untermeyer. Robert Frost's Poems: With an Introduction and Commentary. Pocket Books, 1971.