APA

Pretorius S. J., Van Eeden J. A., . (1969). Some aspects of the morphology of Lymnaea natalensis Krauss (Mollusca: Basommatophora). [Potchefstroom, Transvaal]: Potchefstroom University for C.H.E.

Chicago

Pretorius Saral Jacob, Van Eeden J A, . 1969. Some aspects of the morphology of Lymnaea natalensis Krauss (Mollusca: Basommatophora). [Potchefstroom, Transvaal]: Potchefstroom University for C.H.E.

Harvard

Pretorius S. J., Van Eeden J. A., . (1969). Some aspects of the morphology of Lymnaea natalensis Krauss (Mollusca: Basommatophora). [Potchefstroom, Transvaal]: Potchefstroom University for C.H.E.

MLA

Pretorius Saral Jacob, Van Eeden J A, . Some aspects of the morphology of Lymnaea natalensis Krauss (Mollusca: Basommatophora). [Potchefstroom, Transvaal]: Potchefstroom University for C.H.E. 1969.