Marshall, R. (1939). Silviculture of the trees of Trinidad and Tobago. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Marshall, R.C. Silviculture of the Trees of Trinidad and Tobago. London: Oxford University Press, 1939.
Lua MLA (9ú heag.)Marshall, R.C. Silviculture of the Trees of Trinidad and Tobago. Oxford University Press, 1939.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.