APA

South African Institution of Civil Engineers, South African Institution of Civil Engineers & Symposium on Construction over Mined Areas. (1992). COMA. Johannesburg: South African Institute of Civil Engineers.

Chicago

South African Institution of Civil Engineers, South African Institution of Civil Engineers and Symposium on Construction over Mined Areas. 1992. COMA. Johannesburg: South African Institute of Civil Engineers.

Harvard

South African Institution of Civil Engineers, South African Institution of Civil Engineers and Symposium on Construction over Mined Areas. (1992). COMA. Johannesburg: South African Institute of Civil Engineers.

MLA

South African Institution of Civil Engineers, South African Institution of Civil Engineers and Symposium on Construction over Mined Areas. COMA. Johannesburg: South African Institute of Civil Engineers. 1992.