Various; Bates, H. Astounding Stories of Super-Science, August 1930.
Chicago-čujuhus (17. p.)Various; Bates, Harry. Astounding Stories of Super-Science, August 1930.
MLA-čujuhus (9. p.)Various; Bates, Harry. Astounding Stories of Super-Science, August 1930.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.