Cita APA

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

Citación estilo Chicago

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

Cita MLA

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