Cita APA (7th ed.)

Parnov, E. (1971). At the crossroads of infinities. Mir.

Cita Chicago (17th ed.)

Parnov, E.I. At the Crossroads of Infinities. Moscow: Mir, 1971.

Cita MLA (9th ed.)

Parnov, E.I. At the Crossroads of Infinities. Mir, 1971.