APA
Willis B., . (1981). Mineral processing technology: an introduction to the practical aspect of ore treatment and miniral recovery. oxford: pergamon press.
Chicago
Willis B.A, . 1981. Mineral processing technology: an introduction to the practical aspect of ore treatment and miniral recovery. oxford: pergamon press.
Harvard
Willis B., . (1981). Mineral processing technology: an introduction to the practical aspect of ore treatment and miniral recovery. oxford: pergamon press.
MLA
Willis B.A, . Mineral processing technology: an introduction to the practical aspect of ore treatment and miniral recovery. oxford: pergamon press. 1981.