Smith, N. J. H., & Smith, N. J. H. (1992). Tropical forests and their crops. Comstock Pub. Associates.
Lua i Stíl Chicago (17ú heag.)Smith, Nigel J. H., agus Nigel J. H. Smith. Tropical Forests and Their Crops. Ithaca: Comstock Pub. Associates, 1992.
Lua MLA (8ú heag.)Smith, Nigel J. H., agus Nigel J. H. Smith. Tropical Forests and Their Crops. Comstock Pub. Associates, 1992.
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