In memoriam C. Gessler (1834-1920).

MLA

In Memoriam C. Gessler (1834-1920). Tongres: Collée, 1920.

APA

(1920). In memoriam C. Gessler (1834-1920). Tongres: Collée.

Chicago

In Memoriam C. Gessler (1834-1920). Tongres: Collée, 1920.