Cita APA (7th ed.)

Krökel, F. (1955). Bunte Steine: Fritz Krökel. Lux.

Cita Chicago (17th ed.)

Krökel, Fritz. Bunte Steine: Fritz Krökel. Murnau [u.a.]: Lux, 1955.

Cita MLA (8th ed.)

Krökel, Fritz. Bunte Steine: Fritz Krökel. Lux, 1955.