APA Style

Summers, L, G, U, L, (, C, E, D. (1993 (1st edition), ). Longman Language Activator (First Edition (1993); Revised/New Edition (2002) a). Harlow, Essex, England: Longman.

MLA Style

Summers, Longman, Group, UK, Ltd., (Primary), Chief, Editor:, Della. "Longman Language Activator". First Edition (1993); Revised/New Edition (2002) a Harlow, Essex, England: Longman, 1993 (1st edition), . BOOK.