Bergh, H. (1963). Upward trails. Review and Herald.
Cita Chicago (17th ed.)Bergh, Herri. Upward Trails. Review and Herald, 1963.
Cita MLA (9th ed.)Bergh, Herri. Upward Trails. Review and Herald, 1963.
Atenció: Aquestes cites poden no estar 100% correctes.