APA (7th ed.) Citation

Robel, G. (1991). Sowjetunion. [s.n.].

Chicago Style (17th ed.) Citation

Robel, Gert. Sowjetunion. [S.l.]: [s.n.], 1991.

MLA (9th ed.) Citation

Robel, Gert. Sowjetunion. [s.n.], 1991.

Warning: These citations may not always be 100% accurate.