APA (7th ed.) Citation

Richards J. Jack C., Platt J. John, & Platt H. Heidi. (1999). Longman Dictionary of Language Teaching & Applied Linguistics. Longman, 1999.

Chicago Style (17th ed.) Citation

Richards J. Jack C., Platt J. John, and Platt H. Heidi. Longman Dictionary of Language Teaching & Applied Linguistics. Longman, 1999, 1999.

MLA (9th ed.) Citation

Richards J. Jack C., et al. Longman Dictionary of Language Teaching & Applied Linguistics. Longman, 1999, 1999.