APA (7th ed.) Citation

Ritter, G. (1963). Luther, his life and work. Harper & Row.

Chicago Style (17th ed.) Citation

Ritter, Gerhard. Luther, His Life and Work. New York: Harper & Row, 1963.

MLA (9th ed.) Citation

Ritter, Gerhard. Luther, His Life and Work. Harper & Row, 1963.

Warning: These citations may not always be 100% accurate.