Cita APA (7th ed.)

Krupp, W., & Arp, H. (2000). Arp: Line and form / essay by Walburga Krupp.

Cita Chicago (17th ed.)

Krupp, Walburga, i Hans Arp. Arp: Line and Form / Essay by Walburga Krupp. New York NY, 2000.

Cita MLA (8th ed.)

Krupp, Walburga, i Hans Arp. Arp: Line and Form / Essay by Walburga Krupp. 2000.