Cita APA (7a ed.)

Duckworth, G. (1972). Read, Think and Choose. Gerald Duckworth.

Cita Chicago Style (17a ed.)

Duckworth, Gerald. Read, Think and Choose. Londres, Inglaterra: Gerald Duckworth, 1972.

Cita MLA (9a ed.)

Duckworth, Gerald. Read, Think and Choose. Gerald Duckworth, 1972.