Gaya APA

Muir, W, L. (1976). Coal Exploration (Proceedings of the First Interna-tional Coal exploration Symposium). . California: Miller Freeman Publ Inc..

Gaya MLA

Muir, William, L.G.. "Coal Exploration (Proceedings of the First Interna-tional Coal exploration Symposium).". California: Miller Freeman Publ Inc., 1976. Text.