Cita APA (7th ed.)

FRANK, M. (1972). Modern english: Exercises for non-native speakers .. Prentice-Hall.

Cita Chicago (17th ed.)

FRANK, Marcella. Modern English: Exercises for Non-native Speakers .. New Jersey: Prentice-Hall, 1972.

Cita MLA (9th ed.)

FRANK, Marcella. Modern English: Exercises for Non-native Speakers .. Prentice-Hall, 1972.