Cita APA

Orvedal, A. C., & Orvedal, A. C. (1977). Bibliography of the soils of the tropics. Washington: Agency for International Development Technical Assistance Bureau Office of Agr.

Citación estilo Chicago

Orvedal, Arnold Clifford, y Arnold Clifford Orvedal. Bibliography of the Soils of the Tropics. Washington: Agency for International Development Technical Assistance Bureau Office of Agr, 1977.

Cita MLA

Orvedal, Arnold Clifford, y Arnold Clifford Orvedal. Bibliography of the Soils of the Tropics. Washington: Agency for International Development Technical Assistance Bureau Office of Agr, 1977.