APA (7th ed.) Citation

Koker, A. (1985). A study of the direct liquefaction of Indian Head Lignite. [publisher not identified].

Chicago Style (17th ed.) Citation

Koker, Agah. A Study of the Direct Liquefaction of Indian Head Lignite. [Place of publication not identified]: [publisher not identified], 1985.

MLA (9th ed.) Citation

Koker, Agah. A Study of the Direct Liquefaction of Indian Head Lignite. [publisher not identified], 1985.

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