APA (7th ed.) Citation

Gatenby, E. V. (1962). A direct method english course, Book V. Longmans.

Chicago Style (17th ed.) Citation

Gatenby, E. V. A Direct Method English Course, Book V. London: Longmans, 1962.

MLA (9th ed.) Citation

Gatenby, E. V. A Direct Method English Course, Book V. Longmans, 1962.