APA (7th ed.) Citation

Mellors, Pollitt, & Radtke. (1993). Directory of language training and services for business: A guide to resources in further and higher education. Routledge.

Chicago Style (17th ed.) Citation

Mellors, Pollitt, and Radtke. Directory of Language Training and Services for Business: A Guide to Resources in Further and Higher Education. London: Routledge, 1993.

MLA (9th ed.) Citation

Mellors, et al. Directory of Language Training and Services for Business: A Guide to Resources in Further and Higher Education. Routledge, 1993.