S.C.Van Doesburgh. (1930). The Development of Science in the Netherlands During the Last Half Century (1.). S.C.Van Doesburgh.
Chicago-čujuhus (17. p.)S.C.Van Doesburgh. The Development of Science in the Netherlands During the Last Half Century. 1. Netherlands: S.C.Van Doesburgh, 1930.
MLA-čujuhus (9. p.)S.C.Van Doesburgh. The Development of Science in the Netherlands During the Last Half Century. 1. S.C.Van Doesburgh, 1930.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.