APA引文

India. Coal Board. Publication and Statistics Wing. Coal directory of India. Publication and Statistics Wing, Coal Board.

Chicago Style (17th ed.) Citation

India. Coal Board. Publication and Statistics Wing. Coal Directory of India. Calcutta: Publication and Statistics Wing, Coal Board.

MLA引文

India. Coal Board. Publication and Statistics Wing. Coal Directory of India. Publication and Statistics Wing, Coal Board.

警告：这些引文格式不一定是100％准确.