APA (7th ed.) Citation

Parkman, F., & Leonard, W. E. (1910). The Oregon trail of Francis Parkman. Ginn and company.

Chicago Style (17th ed.) Citation

Parkman, Francis, and William Ellery Leonard. The Oregon Trail of Francis Parkman. Boston, New York [etc.]: Ginn and company, 1910.

MLA (8th ed.) Citation

Parkman, Francis, and William Ellery Leonard. The Oregon Trail of Francis Parkman. Ginn and company, 1910.