Ross, M. (1978). Rulers and governments of the world. Bowker.
Čikaški stil citiranja (17. izdanje)Ross, Marthe. Rulers and Governments of the World. Bowker, 1978.
MLA način citiranja (9. izdanje)Ross, Marthe. Rulers and Governments of the World. Bowker, 1978.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.