Robertson, E., & Guy, F. (2017). Arp: The poetry of forms / Eric Robertson, Frances Guy ; Kröller-Müller Museum. Kröller-Müller Museum.
Citazione stile Chigago Style (17a edizione)Robertson, Eric, e Frances Guy. Arp: The Poetry of Forms / Eric Robertson, Frances Guy ; Kröller-Müller Museum. Otterlo: Kröller-Müller Museum, 2017.
Citatione MLA (8a ed.)Robertson, Eric, e Frances Guy. Arp: The Poetry of Forms / Eric Robertson, Frances Guy ; Kröller-Müller Museum. Kröller-Müller Museum, 2017.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.