Bilgera, M. D. (1986). English for specific purposes: For students and professionals. National Book Store.
Citazione stile Chigago Style (17a edizione)Bilgera, Melchora D. English for Specific Purposes: For Students and Professionals. Manila: National Book Store, 1986.
Citatione MLA (9a ed.)Bilgera, Melchora D. English for Specific Purposes: For Students and Professionals. National Book Store, 1986.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.