Cita APA (7th ed.)
Strutt, P. (1993). Longman business english usage. Longman.
Cita Chicago (17th ed.)
Strutt, Peter. Longman Business English Usage. England: Longman, 1993.
Cita MLA (9th ed.)
Strutt, Peter. Longman Business English Usage. Longman, 1993.
Atenció: Aquestes cites poden no estar 100% correctes.