MLA

Prayon-van Zuylen, A, Adolf De Ceuleneer, and L Willems. Europa's Wording. S.l.: s.n., .d.

APA

Prayon-van Zuylen, A., De Ceuleneer, A., & Willems, L. (.d). Europa's wording. S.l.: s.n.

Chicago

Prayon-van Zuylen, A., Adolf De Ceuleneer, and L Willems. Europa's Wording. S.l.: s.n., .d.