Cita APA (7a ed.)
Lord, T. R., & Travis, H. J. (2011). Schoolyard science: 101 easy and inexpensive activities. National Science Teachers Association.
Cita Chicago Style (17a ed.)
Lord, Thomas R., y Holly J. Travis. Schoolyard Science: 101 Easy and Inexpensive Activities. Arlington, Va.: National Science Teachers Association, 2011.
Cita MLA (9a ed.)
Lord, Thomas R., y Holly J. Travis. Schoolyard Science: 101 Easy and Inexpensive Activities. National Science Teachers Association, 2011.
Precaución: Estas citas no son 100% exactas.