APA引文

HOWARD , J. (1997). I CAN READ ABOUT FOSSILS. TROLL ASSOCIATES.

芝加哥风格引文

HOWARD , JOHN. I CAN READ ABOUT FOSSILS. USA: TROLL ASSOCIATES, 1997.

MLA引文

HOWARD , JOHN. I CAN READ ABOUT FOSSILS. TROLL ASSOCIATES, 1997.

警告：这些引文格式不一定是100％准确.