Spencer, H. Archivmaterialien zu Herbert Spencer, 1820-1903.
芝加哥风格引文Spencer, Herbert. Archivmaterialien Zu Herbert Spencer, 1820-1903.
MLA引文Spencer, Herbert. Archivmaterialien Zu Herbert Spencer, 1820-1903.
警告：这些引文格式不一定是100％准确.
APA引文
