APA (7th ed.) Citation

Carson, B. A. (1938). Poems of American cowboys & nature. [publisher not identified].

Chicago Style (17th ed.) Citation

Carson, Bob A. Poems of American Cowboys & Nature. [Place of publication not identified]: [publisher not identified], 1938.

MLA (9th ed.) Citation

Carson, Bob A. Poems of American Cowboys & Nature. [publisher not identified], 1938.