Cita APA (7a ed.)
Ohlsen, M. M. (1959). Modern methods in elementary education.
Cita estilo Chicago (17a ed.)
Ohlsen, Merle M. Modern Methods in Elementary Education. 1959.
Cita MLA (9a ed.)
Ohlsen, Merle M. Modern Methods in Elementary Education. 1959.
警告：這些引文格式不一定是100％准確.