Cita APA (7th ed.)

Salisbury, H. E. (1970). The 900 days: The siege of Leningrad. Avon.

Cita Chicago (17th ed.)

Salisbury, Harrison E. The 900 Days: The Siege of Leningrad. Nueva York: Avon, 1970.

Cita MLA (9th ed.)

Salisbury, Harrison E. The 900 Days: The Siege of Leningrad. Avon, 1970.