Cita APA (7a ed.)
Swango, C. J., & Steward, S. B. (2002). Help! I'm teaching middle school science. NSTApress.
Cita Chicago Style (17a ed.)
Swango, C. Jill, y Sally Boles Steward. Help! I'm Teaching Middle School Science. Arlington, Va.: NSTApress, 2002.
Cita MLA (9a ed.)
Swango, C. Jill, y Sally Boles Steward. Help! I'm Teaching Middle School Science. NSTApress, 2002.
Precaución: Estas citas no son 100% exactas.