Orval.

MLA

Orval. Brussel: Drukk. Heliogravure. C. Van Cottenbergh, .d.

APA

(.d). Orval. Brussel: Drukk. Heliogravure. C. Van Cottenbergh.

Chicago

Orval. Brussel: Drukk. Heliogravure. C. Van Cottenbergh, .d.