APA (7th ed.) Citation

Countryman, A. J. (1951). A pioneer's trip across the plains. [publisher not identified].

Chicago Style (17th ed.) Citation

Countryman, A. J. A Pioneer's Trip Across the Plains. [Place of publication not identified]: [publisher not identified], 1951.

MLA (9th ed.) Citation

Countryman, A. J. A Pioneer's Trip Across the Plains. [publisher not identified], 1951.