HARRISON. E. R. (2012). FRANK MODERN CERTIFICATE BIOLOGY FOR MIDDLE SCHOOL CLASS- 8 ( 2013- 14 ). FRANK BROS.
芝加哥风格引文HARRISON. E. R. FRANK MODERN CERTIFICATE BIOLOGY FOR MIDDLE SCHOOL CLASS- 8 ( 2013- 14 ). FRANK BROS, 2012.
MLA引文HARRISON. E. R. FRANK MODERN CERTIFICATE BIOLOGY FOR MIDDLE SCHOOL CLASS- 8 ( 2013- 14 ). FRANK BROS, 2012.
警告：这些引文格式不一定是100％准确.