Cita APA (7a ed.)

Summers, D. (1983). Longman active study dictionary of English. Longman.

Cita Chicago Style (17a ed.)

Summers, Della. Longman Active Study Dictionary of English. Harlow (england): Longman, 1983.

Cita MLA (9a ed.)

Summers, Della. Longman Active Study Dictionary of English. Longman, 1983.