Cita APA (7th ed.)

Schapiro, J. S. (1950). The world in crisis. McGraw-Hill.

Cita Chicago (17th ed.)

Schapiro, J. Salwyn. The World in Crisis. Nueva York, US: McGraw-Hill, 1950.

Cita MLA (9th ed.)

Schapiro, J. Salwyn. The World in Crisis. McGraw-Hill, 1950.