APA (7th ed.) Citation

Smith, N. J. H., & Smith, N. J. H. (1992). Tropical forests and their crops. Comstock Pub. Associates.

Chicago Style (17th ed.) Citation

Smith, Nigel J. H., and Nigel J. H. Smith. Tropical Forests and Their Crops. Ithaca: Comstock Pub. Associates, 1992.

MLA (8th ed.) Citation

Smith, Nigel J. H., and Nigel J. H. Smith. Tropical Forests and Their Crops. Comstock Pub. Associates, 1992.