Congres BSB-GGB (11-12-13 november 1955 te Gent).

MLA

Congres Bsb-ggb (11-12-13 November 1955 Te Gent). S.l.: s.n., 1955.

APA

(1955). Congres BSB-GGB (11-12-13 november 1955 te Gent). S.l.: s.n.

Chicago

Congres BSB-GGB (11-12-13 November 1955 Te Gent). S.l.: s.n., 1955.