APA (7th ed.) Citation

Não informado. (1977). Coal Abstracts. IEA Coal Research.

Chicago Style (17th ed.) Citation

Não informado. Coal Abstracts. London: IEA Coal Research, 1977.

MLA (8th ed.) Citation

Não informado. Coal Abstracts. IEA Coal Research, 1977.

Warning: These citations may not always be 100% accurate.