Ross, M. (1978). Rulers and governments of the world. Bowker.
Chicago-čujuhus (17. p.)Ross, Marthe. Rulers and Governments of the World. Bowker, 1978.
MLA-čujuhus (9. p.)Ross, Marthe. Rulers and Governments of the World. Bowker, 1978.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.