APA

Brown D S, . (1980). Freshwater snails of Africa and their medical importance. London: Taylor & Francis.

Chicago

Brown D S, . 1980. Freshwater snails of Africa and their medical importance. London: Taylor & Francis.

Harvard

Brown D S, . (1980). Freshwater snails of Africa and their medical importance. London: Taylor & Francis.

MLA

Brown D S, . Freshwater snails of Africa and their medical importance. London: Taylor & Francis. 1980.