Mortensen, E., & Bullard, E. T. (1969). Handbook of tropical and subtropical horticulture ([Rev.].). Agency for International Development; for sale by the Supt. of Docs.
Chicago-referens (17:e uppl.)Mortensen, Ernest, och Ervin T. Bullard. Handbook of Tropical and Subtropical Horticulture. [Rev.]. Washington: Agency for International Development; for sale by the Supt. of Docs, 1969.
MLA-referens (9:e uppl.)Mortensen, Ernest, och Ervin T. Bullard. Handbook of Tropical and Subtropical Horticulture. [Rev.]. Agency for International Development; for sale by the Supt. of Docs, 1969.
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