Παραπομπή APA

Bradley, W. (1964). Clays and clay minerals: :Proceedings of the twelth national conference on clays and clay minerals. The Ma cmillan company.

Παραπομπή Chicago Style

Bradley, W.F. Clays and Clay Minerals: :Proceedings of the Twelth National Conference on Clays and Clay Minerals. 1964: The Ma cmillan company, 1964.

Παραπομπή MLA

Bradley, W.F. Clays and Clay Minerals: :Proceedings of the Twelth National Conference on Clays and Clay Minerals. The Ma cmillan company, 1964.