Gaya APA

Swanson, C, P., Hall, R, P. (1964). **Protozoa the simplest of all animals . New York: New York: Holt, Rinehart and Winston; 1964..

Gaya MLA

Swanson, Carl, P.., Hall, Richard, P.. "**Protozoa the simplest of all animals". New York: New York: Holt, Rinehart and Winston; 1964., 1964. Text.