Cita APA (7a ed.)
Blough, G. O., & Schwartz, J. (1964). Elementary school science and how to teach it.
Cita estilo Chicago (17a ed.)
Blough, Glenn O., y Julius Schwartz. Elementary School Science and How to Teach It. 1964.
Cita MLA (9a ed.)
Blough, Glenn O., y Julius Schwartz. Elementary School Science and How to Teach It. 1964.
Precaución: Estas citas no son 100% exactas.