APA (7th ed.) Citation

(1997). Longman language activator. The world's first production dictionary (1st ed. 7th impression.). [vl. n.].

Chicago Style (17th ed.) Citation

Longman Language Activator. The World's First Production Dictionary. 1st ed. 7th impression. Harlow: [vl. n.], 1997.

MLA (9th ed.) Citation

Longman Language Activator. The World's First Production Dictionary. 1st ed. 7th impression. [vl. n.], 1997.