1. Allsopp Richard. 1958. Pronominal forms in the dialect of English used in Georgetown (British Guiana) and its environs by persons engaged in non-clerical occupations, vol. 2. London: London University MA thesis.
2. Allsopp Richard. 1962. Expressions of state and action in the dialect of English used in the Georgetown area of British Guiana. London: London University PhD dissertation.