APA

(1980). Gaceta - No.56,57,59-66. Bogotá: CONGE.

Chicago

1980. Gaceta - No.56,57,59-66. Bogotá: CONGE.

Harvard

(1980). Gaceta - No.56,57,59-66. Bogotá: CONGE.

MLA

Gaceta - No.56,57,59-66. Bogotá: CONGE. 1980.