APA引文

(1972). Focus on earth science. Columbus, Ohio: Charles E. Merrill Pub.

Trích dẫn kiểu Chicago

Focus On Earth Science. Columbus, Ohio: Charles E. Merrill Pub, 1972.

MLA引文

Focus On Earth Science. Columbus, Ohio: Charles E. Merrill Pub, 1972.

警告：这些引文格式不一定是100％准确.