Cita APA (7a ed.)
Comber, L., & Keeves, J. P. (1973). Science education in nineteen countries: An empirical study.
Cita estilo Chicago (17a ed.)
Comber, L.C, y John P. Keeves. Science Education in Nineteen Countries: An Empirical Study. 1973.
Cita MLA (9a ed.)
Comber, L.C, y John P. Keeves. Science Education in Nineteen Countries: An Empirical Study. 1973.
Precaución: Estas citas no son 100% exactas.