TATA MCGRAW-HILL. (1994). TATA MCGRAW-HILLS WORLD TODAY: A QUIZ AN THE CONTEMPORY WORLD. TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED.
Lua i Stíl Chicago (17ú heag.)TATA MCGRAW-HILL. TATA MCGRAW-HILLS WORLD TODAY: A QUIZ AN THE CONTEMPORY WORLD. NEW DELHI: TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED, 1994.
Lua MLA (9ú heag.)TATA MCGRAW-HILL. TATA MCGRAW-HILLS WORLD TODAY: A QUIZ AN THE CONTEMPORY WORLD. TATA MCGRAW-HILL PUBLISHING COMPANY LIMITED, 1994.
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