Plummer, S. C. (1907). Twenty years of progress.
Citação norma ChicagoPlummer, Samuel C. Twenty Years of Progress. 1907.
MLA引文Plummer, Samuel C. Twenty Years of Progress. 1907.
警告：這些引文格式不一定是100％准確.
APA引文
Plummer, S. C. (1907). Twenty years of progress.
Citação norma ChicagoPlummer, Samuel C. Twenty Years of Progress. 1907.
MLA引文Plummer, Samuel C. Twenty Years of Progress. 1907.