Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (8th ed.)

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