Cita APA (7a ed.)
Blackwood, P. E. Science teaching in the elementary schools: A survey of practices.
Cita estilo Chicago (17a ed.)
Blackwood, Paul E. Science Teaching in the Elementary Schools: A Survey of Practices.
Cita MLA (9a ed.)
Blackwood, Paul E. Science Teaching in the Elementary Schools: A Survey of Practices.
警告：這些引文格式不一定是100％准確.