APA (7th ed.) Citation

Millis, W. (1931). The martial spirit: A study of our war with Spain. Literary Guild of America.

Chicago Style (17th ed.) Citation

Millis, Walter. The Martial Spirit: A Study of Our War with Spain. New York: Literary Guild of America, 1931.

MLA (9th ed.) Citation

Millis, Walter. The Martial Spirit: A Study of Our War with Spain. Literary Guild of America, 1931.