Geringer, L., & Lobel, A. (1985). A three hat day. Harper & Row.
Cita Chicago Style (17a ed.)Geringer, Laura, y Arnold Lobel. A Three Hat Day. [New York, N.Y.]: Harper & Row, 1985.
Cita MLA (8a ed.)Geringer, Laura, y Arnold Lobel. A Three Hat Day. Harper & Row, 1985.
Precaución: Estas citas no son 100% exactas.