VVB Spielwaren <Sonneberg> & Außenhandelsunternehmen DEMUSA GmbH <Berlin>. (1967). Leipzig Spring Fair 1967: Technical Fair and Consumer Goods Fair from 5th Till 14th March ; Fair Catalogue. Volksdruckerei.
Cita Chicago (17th ed.)VVB Spielwaren <Sonneberg> i Außenhandelsunternehmen DEMUSA GmbH <Berlin>. Leipzig Spring Fair 1967: Technical Fair and Consumer Goods Fair from 5th Till 14th March ; Fair Catalogue. Sonneberg: Volksdruckerei, 1967.
Cita MLA (8th ed.)VVB Spielwaren <Sonneberg> i Außenhandelsunternehmen DEMUSA GmbH <Berlin>. Leipzig Spring Fair 1967: Technical Fair and Consumer Goods Fair from 5th Till 14th March ; Fair Catalogue. Volksdruckerei, 1967.
Atenció: Aquestes cites poden no estar 100% correctes.