APA

Kalbermatten J. M., Gunnerson C., Julius D. S. & Banco Mundial (Washington D. (1980). Technical and economic options. Washington, D. C: Banco Mundial.

Chicago

Kalbermatten John M, Gunnerson CharlesG, Julius DeAnne S and Banco Mundial (Washington D.C.). 1980. Technical and economic options. Washington, D. C: Banco Mundial.

Harvard

Kalbermatten J. M., Gunnerson C., Julius D. S. and Banco Mundial (Washington D. (1980). Technical and economic options. Washington, D. C: Banco Mundial.

MLA

Kalbermatten John M, Gunnerson CharlesG, Julius DeAnne S and Banco Mundial (Washington D.C.). Technical and economic options. Washington, D. C: Banco Mundial. 1980.