Harpster, H. T., & Gay, Z. (1948). The insect world (2nd printing.). Viking.
Cita Chicago Style (17a ed.)Harpster, Hilda Thankful, y Zhenya Gay. The Insect World. 2nd printing. New York: Viking, 1948.
Cita MLA (9a ed.)Harpster, Hilda Thankful, y Zhenya Gay. The Insect World. 2nd printing. Viking, 1948.
Precaución: Estas citas no son 100% exactas.