Catalogue : : lettres, documents, manuscrits, etc..

MLA

Abs, Robert. Catalogue : Lettres, Documents, Manuscrits, Etc. Bruxelles: Institut Emile Vandervelde, .

APA

Abs, R. Catalogue : lettres, documents, manuscrits, etc. Bruxelles: Institut Emile Vandervelde.

Chicago

Abs, Robert Catalogue: Lettres, Documents, Manuscrits, Etc.. Bruxelles: Institut Emile Vandervelde.