APA (7th ed.) Citation

Luther, M., & Steck, K. G. (1955). Luther. Fischer Bücherei.

Chicago Style (17th ed.) Citation

Luther, Martin, and Karl Gerhard Steck. Luther. Frankfurt/M: Fischer Bücherei, 1955.

MLA (9th ed.) Citation

Luther, Martin, and Karl Gerhard Steck. Luther. Fischer Bücherei, 1955.

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