APA

Puerto Rico, Puerto Rico, . (1986). The metal industry in Puerto Rico: major group 33 and 34. San Juan, P.R: Economic Development Administration ; Office of Economic Research ; General Ecomonic Division.

Chicago

Puerto Rico, Puerto Rico, . 1986. The metal industry in Puerto Rico: major group 33 and 34. San Juan, P.R: Economic Development Administration ; Office of Economic Research ; General Ecomonic Division.

Harvard

Puerto Rico, Puerto Rico, . (1986). The metal industry in Puerto Rico: major group 33 and 34. San Juan, P.R: Economic Development Administration ; Office of Economic Research ; General Ecomonic Division.

MLA

Puerto Rico, Puerto Rico, . The metal industry in Puerto Rico: major group 33 and 34. San Juan, P.R: Economic Development Administration ; Office of Economic Research ; General Ecomonic Division. 1986.