APA引文

Ballard, W. R. (1970). Geometry. W. B. Saunders.

芝加哥风格引文

Ballard, William R. Geometry. Philadelphia: W. B. Saunders, 1970.

MLA引文

Ballard, William R. Geometry. W. B. Saunders, 1970.

警告：这些引文格式不一定是100％准确.