Cita APA (7th ed.)

Eckersley, C. (1963). Essential english for foreign students: Book four: teacher's book. Longman Group.

Cita Chicago (17th ed.)

Eckersley, C.E. Essential English for Foreign Students: Book Four: Teacher's Book. London: Longman Group, 1963.

Cita MLA (9th ed.)

Eckersley, C.E. Essential English for Foreign Students: Book Four: Teacher's Book. Longman Group, 1963.