TATA SERVICES LIMITED. (1989). STATISTICAL OUTLINE OF INDIA 1989-90. TATA SERVICES LIMITED.
芝加哥风格引文TATA SERVICES LIMITED. STATISTICAL OUTLINE OF INDIA 1989-90. BOMBAY: TATA SERVICES LIMITED, 1989.
MLA引文TATA SERVICES LIMITED. STATISTICAL OUTLINE OF INDIA 1989-90. TATA SERVICES LIMITED, 1989.
警告：这些引文格式不一定是100％准确.