Cita APA

(1999). The English initiative: Level 4, units 49-64. New York, New York: McGraw-Hill.

Citación estilo Chicago

The English Initiative: Level 4, Units 49-64. New York, New York: McGraw-Hill, 1999.

Cita MLA

The English Initiative: Level 4, Units 49-64. New York, New York: McGraw-Hill, 1999.