Cita APA (7th ed.)

Delos Reyes, R. A. (1991). Watch your business English: A practical guidebook to over 800 concerns on correct usage in business correspondence. PROSEC.

Cita Chicago (17th ed.)

Delos Reyes, Rodolfo A. Watch Your Business English: A Practical Guidebook to over 800 Concerns on Correct Usage in Business Correspondence. Makati: PROSEC, 1991.

Cita MLA (9th ed.)

Delos Reyes, Rodolfo A. Watch Your Business English: A Practical Guidebook to over 800 Concerns on Correct Usage in Business Correspondence. PROSEC, 1991.