APA (7th ed.) Citation

Whitman, W., & Goyert, G. (1948). Grashalme. Lothar Blanvalet.

Chicago Style (17th ed.) Citation

Whitman, Walt, and Georg Goyert. Grashalme. Berlin: Lothar Blanvalet, 1948.

MLA (9th ed.) Citation

Whitman, Walt, and Georg Goyert. Grashalme. Lothar Blanvalet, 1948.