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. Englewood Cliffs: Prentice-Hall, 1972.

Cita MLA (9th ed.)

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