Cita APA (7a ed.)

Summers, D. (1987). Longman dictionary of contemporary English (New ed.). Longman.

Cita Chicago Style (17a ed.)

Summers, Della. Longman Dictionary of Contemporary English. New ed. Harlow, Essex, England: Longman, 1987.

Cita MLA (8a ed.)

Summers, Della. Longman Dictionary of Contemporary English. New ed. Longman, 1987.