The three circles of English :
language specialists talk about the English language /
edited by Edwin Thumboo.

APA Citation

Thumboo, E. (2001). The three circles of English: language specialists talk about the English language. Singapore: UniPress.

MLA Citation

Thumboo, Edwin, 1933-. The Three Circles of English: Language Specialists Talk About the English Language. Singapore: UniPress, 2001.

Warning: These citations may not always be complete (especially for serials).