APA (7th ed.) Citation

Linguaphone Institute. (1988). Linguaphone English course. Linguaphone Institute.

Chicago Style (17th ed.) Citation

Linguaphone Institute. Linguaphone English Course. London: Linguaphone Institute, 1988.

MLA (9th ed.) Citation

Linguaphone Institute. Linguaphone English Course. Linguaphone Institute, 1988.

Warning: These citations may not always be 100% accurate.