Não informado. (1909). Bulletin of the Department of Agriculture, Trinidad and Tobago. Trinidad and Tobago Department of Agriculture.
Παραπομπή σε μορφή Chicago (17η εκδ.)Não informado. Bulletin of the Department of Agriculture, Trinidad and Tobago. Port of Spain: Trinidad and Tobago Department of Agriculture, 1909.
Παραπομπή σε μορφή MLA (8th εκδ.)Não informado. Bulletin of the Department of Agriculture, Trinidad and Tobago. Trinidad and Tobago Department of Agriculture, 1909.
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