Gaya APA

HILL, V. (1981). THE PROPERTIES AND PERFORMANCE OF MATERIALS IN THE COAL GASIFICATION ENVIROTMENT . United State of America: AMERICAN SOCIETY FOR MENTALS.

Gaya MLA

HILL, V.L. "THE PROPERTIES AND PERFORMANCE OF MATERIALS IN THE COAL GASIFICATION ENVIROTMENT". United State of America: AMERICAN SOCIETY FOR MENTALS, 1981. Textbook.