TATA SERVICES LIMITED. (1989). STATISTICAL OUTLINE OF INDIA 1989-90. TATA SERVICES LIMITED.
Chicago-viite (17. p.)TATA SERVICES LIMITED. STATISTICAL OUTLINE OF INDIA 1989-90. BOMBAY: TATA SERVICES LIMITED, 1989.
MLA-viite (9. p.)TATA SERVICES LIMITED. STATISTICAL OUTLINE OF INDIA 1989-90. TATA SERVICES LIMITED, 1989.
Varoitus: Nämä viitteet eivät aina ole täysin luotettavia.