Libbey, J. K. (1977). Alexander Gumberg and Soviet-American Relations: 1917-1933. University Press of Kentucky.
Cita Chicago Style (17a ed.)Libbey, James K. Alexander Gumberg and Soviet-American Relations: 1917-1933. Lexington: University Press of Kentucky, 1977.
Cita MLA (8a ed.)Libbey, James K. Alexander Gumberg and Soviet-American Relations: 1917-1933. University Press of Kentucky, 1977.
Precaución: Estas citas no son 100% exactas.