Cita APA (7th ed.)
Wardhaugh, R. (1975). English around the world: level 2: Teacher`s guide. (2a. ed.). Scott, Foresman and Company.
Cita Chicago (17th ed.)
Wardhaugh, Ronald. English Around the World: Level 2: Teacher`s Guide. 2a. ed. Estados Unidos: Scott, Foresman and Company, 1975.
Cita MLA (9th ed.)
Wardhaugh, Ronald. English Around the World: Level 2: Teacher`s Guide. 2a. ed. Scott, Foresman and Company, 1975.
Atenció: Aquestes cites poden no estar 100% correctes.