APA (7th ed.) Citation

(1956). Six keys to the Soviet system. With an introd. by L.C. Stevens. Boston.

Chicago Style (17th ed.) Citation

Six Keys to the Soviet System. With an Introd. by L.C. Stevens. Boston, 1956.

MLA (8th ed.) Citation

Six Keys to the Soviet System. With an Introd. by L.C. Stevens. Boston, 1956.

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