Cita APA (7th ed.)

Ismail, A. (1999). Catering sales and convention services. Delmar Pub.

Cita Chicago (17th ed.)

Ismail, Ahmed. Catering Sales and Convention Services. Albany: Delmar Pub, 1999.

Cita MLA (9th ed.)

Ismail, Ahmed. Catering Sales and Convention Services. Delmar Pub, 1999.